diff --git a/Sprint-2/1-key-exercises/1-count.js b/Sprint-2/1-key-exercises/1-count.js
index 117bcb2b6..fd85be739 100644
--- a/Sprint-2/1-key-exercises/1-count.js
+++ b/Sprint-2/1-key-exercises/1-count.js
@@ -1,6 +1,6 @@
 let count = 0;
 
 count = count + 1;
+console.log(count)
 
-// Line 1 is a variable declaration, creating the count variable with an initial value of 0
-// Describe what line 3 is doing, in particular focus on what = is doing
+// Line 3 has been able to reassign the value of the count variable from 0 to 1. The operator = assign the new value to be stored as 1.
\ No newline at end of file
diff --git a/Sprint-2/1-key-exercises/2-initials.js b/Sprint-2/1-key-exercises/2-initials.js
index 964c9563c..46c126832 100644
--- a/Sprint-2/1-key-exercises/2-initials.js
+++ b/Sprint-2/1-key-exercises/2-initials.js
@@ -1,10 +1,7 @@
 const firstName = "Creola";
 const middleName = "Katherine";
 const lastName = "Johnson";
+const initials = `${firstName[0]}${middleName[0]}${lastName[0]}`;
 
-// Declare a variable called initials that stores the first character of each string.
-// This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
+console.log(initials);
 
-const initials = ``;
-
-// https://www.google.com/search?q=get+first+character+of+string+mdn
diff --git a/Sprint-2/1-key-exercises/3-paths.js b/Sprint-2/1-key-exercises/3-paths.js
index ab90ebb28..7b6d6b9c4 100644
--- a/Sprint-2/1-key-exercises/3-paths.js
+++ b/Sprint-2/1-key-exercises/3-paths.js
@@ -17,7 +17,11 @@ console.log(`The base part of ${filePath} is ${base}`);
 // Create a variable to store the dir part of the filePath variable
 // Create a variable to store the ext part of the variable
 
-const dir = ;
-const ext = ;
+const dir = filePath.slice(0, lastSlashIndex);
+console.log(`The dir part of ${filePath} is ${dir}`);
+
+const ext = base.slice(4);
+console.log(`The ext part of ${filePath} is ${ext}`);
+
 
 // https://www.google.com/search?q=slice+mdn
\ No newline at end of file
diff --git a/Sprint-2/1-key-exercises/4-random.js b/Sprint-2/1-key-exercises/4-random.js
index 292f83aab..bf58fafae 100644
--- a/Sprint-2/1-key-exercises/4-random.js
+++ b/Sprint-2/1-key-exercises/4-random.js
@@ -2,8 +2,11 @@ const minimum = 1;
 const maximum = 100;
 
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
+console.log(num);
 
-// In this exercise, you will need to work out what num represents?
-// Try breaking down the expression and using documentation to explain what it means
-// It will help to think about the order in which expressions are evaluated
-// Try logging the value of num and running the program several times to build an idea of what the program is doing
+
+// num variable that carries the result of the expressions evaluated.
+// (maximum - minimum) does basic math: 100 - 1 + 1 = 100
+// Math.floor() takes out all decimal and make them an integer.
+// Math.random() gives random numbers between 0 and 100.
+// + minimum add 1 at the end but randomise to the value between 0 and 100
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-errors/0.js b/Sprint-2/2-mandatory-errors/0.js
index cf6c5039f..d5de77529 100644
--- a/Sprint-2/2-mandatory-errors/0.js
+++ b/Sprint-2/2-mandatory-errors/0.js
@@ -1,2 +1,5 @@
-This is just an instruction for the first activity - but it is just for human consumption
-We don't want the computer to run these 2 lines - how can we solve this problem?
\ No newline at end of file
+// This is just an instruction for the first activity - but it is just for human consumption
+// We don't want the computer to run these 2 lines - how can we solve this problem?
+
+
+// This error is a syntaxError because javaScript could not understand the text. The error can be solved by commenting the lines using ("//")
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-errors/1.js b/Sprint-2/2-mandatory-errors/1.js
index 7a43cbea7..455d2f3ae 100644
--- a/Sprint-2/2-mandatory-errors/1.js
+++ b/Sprint-2/2-mandatory-errors/1.js
@@ -1,4 +1,8 @@
 // trying to create an age variable and then reassign the value by 1
 
-const age = 33;
+let age = 33;
 age = age + 1;
+console.log(age);
+
+// This code returns a "TypeError: Assignment to constant variable.", because the variable age has been made constant and can't be manipulated.
+// To solve the problem, we have to reassign the age variable from "const" to "let", that way it will allow for further manipulation and solve the error.
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-errors/2.js b/Sprint-2/2-mandatory-errors/2.js
index e09b89831..be5e8e8c1 100644
--- a/Sprint-2/2-mandatory-errors/2.js
+++ b/Sprint-2/2-mandatory-errors/2.js
@@ -1,5 +1,9 @@
 // Currently trying to print the string "I was born in Bolton" but it isn't working...
 // what's the error ?
 
-console.log(`I was born in ${cityOfBirth}`);
 const cityOfBirth = "Bolton";
+console.log(`I was born in ${cityOfBirth}`);
+
+
+// In this task, the variable was not assigned before attempting to print. Therefore, it gives the error "ReferenceError: Cannot access 'cityOfBirth' before initialization"
+// The solution would be to assign the variable "cityOfBirth" first before printing the code.
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-errors/3.js b/Sprint-2/2-mandatory-errors/3.js
index ec101884d..2f163ffd5 100644
--- a/Sprint-2/2-mandatory-errors/3.js
+++ b/Sprint-2/2-mandatory-errors/3.js
@@ -1,9 +1,8 @@
-const cardNumber = 4533787178994213;
+const cardNumber = "4533787178994213";
 const last4Digits = cardNumber.slice(-4);
+console.log(last4Digits)
 
-// The last4Digits variable should store the last 4 digits of cardNumber
-// However, the code isn't working
-// Before running the code, make and explain a prediction about why the code won't work
-// Then run the code and see what error it gives.
-// Consider: Why does it give this error? Is this what I predicted? If not, what's different?
-// Then try updating the expression last4Digits is assigned to, in order to get the correct value
+// The variable cardNumber is not a string and the slice() function works with strings or array
+
+// Consider: Why does it give this error? 
+// It gave that error "TypeError: cardNumber.slice is not a function" brcause the slice() function tool are not applicable to numbers.     
diff --git a/Sprint-2/2-mandatory-errors/4.js b/Sprint-2/2-mandatory-errors/4.js
index 5f86c730b..52110e8cf 100644
--- a/Sprint-2/2-mandatory-errors/4.js
+++ b/Sprint-2/2-mandatory-errors/4.js
@@ -1,2 +1,6 @@
-const 12HourClockTime = "8:53pm";
-const 24hourClockTime = "20:53";
+const HourClockTime1 = "8:53pm";
+const hourClockTime2 = "20:53";
+console.log(`${HourClockTime1}, ${hourClockTime2}`)
+
+//  The code displayed the error "SyntaxError: Invalid or unexpected token", this is because javaScript does not understand the variable name format.
+// This error is solved by renaming the variable name starting it with an alphabet and avoiding starting the variable with a number.
diff --git a/Sprint-2/3-mandatory-interpret/1-percentage-change.js b/Sprint-2/3-mandatory-interpret/1-percentage-change.js
index e24ecb8e1..94eed36ef 100644
--- a/Sprint-2/3-mandatory-interpret/1-percentage-change.js
+++ b/Sprint-2/3-mandatory-interpret/1-percentage-change.js
@@ -2,7 +2,7 @@ let carPrice = "10,000";
 let priceAfterOneYear = "8,543";
 
 carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",",""));
 
 const priceDifference = carPrice - priceAfterOneYear;
 const percentageChange = (priceDifference / carPrice) * 100;
@@ -13,10 +13,23 @@ console.log(`The percentage change is ${percentageChange}`);
 
 // a) How many function calls are there in this file? Write down all the lines where a function call is made
 
+// Answer: Line 4 has 2 function call :'Number(), replaceAll()'. 
+// Line 5 has 2 function call: 'Number(), replaceAll()'. 
+// Line 10 has 1 function call console.log() 
+// In total there are 5 function calls.
+
 // b) Run the code and identify the line where the error is coming from - why is this error occurring? How can you fix this problem?
+// Answer: The error is coming from line 5, spotting at the Number(priceAfterOneYear.replaceAll("," ""));
+// It's a "SyntaxError: missing ) after argument list",  missing a comma inside the replaceAll.() function.
 
 // c) Identify all the lines that are variable reassignment statements
 
+// Answer: Line 4 and 5 are variable assignment statements
+
 // d) Identify all the lines that are variable declarations
 
+//  Answer: Line 1,2,7 and 8 are variable declearations
+
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+
+// Answer: ReplaceAll() function clears out all the commas in the strings, the number() converts the strings to numbers to help with calculation
diff --git a/Sprint-2/3-mandatory-interpret/2-time-format.js b/Sprint-2/3-mandatory-interpret/2-time-format.js
index 47d239558..c730783ce 100644
--- a/Sprint-2/3-mandatory-interpret/2-time-format.js
+++ b/Sprint-2/3-mandatory-interpret/2-time-format.js
@@ -13,13 +13,27 @@ console.log(result);
 
 // a) How many variable declarations are there in this program?
 
+// Answer: There is only 6 variable declearation altogether in this program
+
 // b) How many function calls are there?
 
+// Answer:  There is only 1 call function in this program console.log()
+
 // c) Using documentation, explain what the expression movieLength % 60 represents
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
 
+// Answer: The % symbol represent the remainder (modulo) operator, it calculates the leftover/remainder after integer division.
+// Answer: % 60 divides the movieLength by 60 and returns only the remainder.
+
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
 
+// Answer: Line 4 expression helps to eliminate any remainder from the equation, so its left with a clean multiple of 60 to avoid any decimal
+
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
 
+// Answer: It represent the total duration of the movie formatted into hours, minutes and seconds 
+// Answer: A better name could be "totalMovieDuration"
+
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+
+// Answer: It will work for integer values and will give us clear and clean result using this code. However, the result would not be clean as this using float values
diff --git a/Sprint-2/3-mandatory-interpret/3-to-pounds.js b/Sprint-2/3-mandatory-interpret/3-to-pounds.js
index 60c9ace69..c798b315a 100644
--- a/Sprint-2/3-mandatory-interpret/3-to-pounds.js
+++ b/Sprint-2/3-mandatory-interpret/3-to-pounds.js
@@ -25,3 +25,35 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+
+// Answers: In line 1, a variable "penceString" was created holding the value "399p"
+
+// In line 3-6, Another variable "penceStringWithoutTrailingP" was created to remove the trainling "p". 
+// That is, taking off the "p" in '399p' leaving it at just "399".
+
+// Also, line 3-6 used the function substring(0, penceString.lrength - 1) to cut out the "p" in the "penceString" variable. 
+// By starting count fron 0 (beginnning) of "399p".
+// "Using penceString.lenght - 1" to check the length of the value in the variable penceString = "399p" (4),
+//  And deducting 1 from the value (4 - 1), because length - 1 subtract 1 from the character/value count 4. leaving the value at "399"
+
+// Line 8 a variable "paddedPenceNumberString" was created and a function padStart(3, "0") 
+// was used to ensure the value of the variable remains at 3 and to be filled with "0" at the beginning if the value is less 3
+
+// Line 9-12 created a variable "pounds" and used the subString(0, paddedPenceNumberString.length - 2 ) 
+// to start count from 0 of the "penceStringWithoutTrailingP" value which is 399. 
+// It further removed the last two number in the value by checking the length of the value with "paddedPenceNumberString.length" 
+// And subtracting 2 (3 - 2), because length - 2 subtract 2 from the character/value count. Cutting out 99 and leaving the value to remain 3.
+
+// Line 14-16 created a variable "pence", using the subString(paddedPenceNumberString.length - 2) 
+// to check the length of the value of the variable "paddedPenceNumberString" which remain 399 from line 8
+// The "substring(paddedPenceNumberString.length - 2)" function deducts 3 leaving the last two numbers 99 
+// PadEnd(2, "0") ensure the value remains 2 and 0 to be added to value less than 2. 
+// However, we already have in our "pence" variable at a value of 2 numbers "99"
+
+// Line 18 printed our codes a formatted style adding the pound sign "£" 
+
+
+
+
+
+
diff --git a/Sprint-2/Prep/Hello_World.js b/Sprint-2/Prep/Hello_World.js
new file mode 100644
index 000000000..e69de29bb
diff --git a/Sprint-2/Prep/facts.js b/Sprint-2/Prep/facts.js
new file mode 100644
index 000000000..01f81f418
--- /dev/null
+++ b/Sprint-2/Prep/facts.js
@@ -0,0 +1,2 @@
+console.log("One fact i love about git is that it allows people to collaborate on projects");
+
diff --git a/Sprint-2/Prep/functions.js b/Sprint-2/Prep/functions.js
new file mode 100644
index 000000000..3d7029f20
--- /dev/null
+++ b/Sprint-2/Prep/functions.js
@@ -0,0 +1,66 @@
+console.log("In this exercise I will be learning different functions, and preactising them. ");
+
+let userName = "Matthew";
+let location = "Manchester";
+let favoriteFood = "Jollof rice";
+
+function myInfo(userName, location, favoriteFood) {
+    console.log(`My name is ${userName}` )
+    console.log(`I live in ${location}` )
+    console.log(`My favorite food is ${favoriteFood}` )
+};
+myInfo(userName, location, favoriteFood);
+
+sliceUserName = userName.slice(0, 4);
+console.log(`My friends love to call me ${sliceUserName}`);
+
+sliceLocation = location.lastIndexOf("h");
+console.log(sliceLocation);
+
+const number1 = "50";
+const number2 = "100";
+const result = Number(number1) + Number(number2);
+console.log(result);
+
+let hobby = "I love football and traveling";
+let moreHobby = hobby.replaceAll("football", "swiming").replaceAll("traveling", "hiking");
+console.log(moreHobby);
+
+const passion = hobby.substring(6, 15);
+console.log(passion);
+
+const luckyNumber = "7";
+const changeNumber = luckyNumber.padStart(5, "0");
+console.log(changeNumber);
+
+const anotherNumber = luckyNumber.padEnd(5, "0");
+console.log(anotherNumber);
+
+const carPrice = 30000.50;
+const updatedCarPrice = Math.floor(carPrice);
+console.log(updatedCarPrice);
+
+const addNumber = 20;
+const addNumber2 = 30;
+const addNumber3 = addNumber + addNumber2;
+const addNumberResult = Math.random() * addNumber3
+console.log(addNumberResult);
+
+const repeatedText = "one, two, three";
+const lastOnePosition = repeatedText.lastIndexOf("one");
+console.log(lastOnePosition);
+
+// const yourName = prompt("Please enter your name: ");
+// const yourLocation = prompt("Please enter your location: ");
+// const yourHobby = prompt("Enter your hobby: ");
+// const yourFavoriteFood = prompt("Please enter your favorite food: ")
+
+// function userInfo(yourName, yourLocation, yourHobby, yourFavoriteFood) {
+//     console.log(`Your name is ${yourName}`)
+//     console.log(`You live in ${yourLocation}`)
+//     console.log(`Your hobby is ${yourHobby}`)
+//     console.log(`Your favorite food is ${yourFavoriteFood}`)
+// }
+
+// userInfo(yourName, yourLocation, yourHobby, yourFavoriteFood)
+// Chrome devOps prompt function, variable and parameters
diff --git a/Sprint-2/Prep/greeting.js b/Sprint-2/Prep/greeting.js
new file mode 100644
index 000000000..c41f3aee1
--- /dev/null
+++ b/Sprint-2/Prep/greeting.js
@@ -0,0 +1,34 @@
+const greeting = "Hello There !";
+console.log(greeting);
+
+const name = "Matt";
+console.log(`${greeting}, I am ${name}`);
+
+let location = "Manchester";
+console.log(`${greeting}, my name is ${name} and i live in ${location} `);
+
+let location2 = "London";
+console.log(`${greeting}, I am ${name}, I will be traveling to ${location2} soon`);
+
+console.log("Dog" === "Mango");
+
+console.log(5 + 15 === 20);
+
+console.log("dog" == "dog");
+
+console.log(40+5 == "45");
+
+console.log(60+40 > 50);
+
+console.log(100<= 90);
+
+
+
+
+
+
+
+
+
+
+
diff --git a/Sprint-2/Prep/password.js b/Sprint-2/Prep/password.js
new file mode 100644
index 000000000..cf6d59c07
--- /dev/null
+++ b/Sprint-2/Prep/password.js
@@ -0,0 +1,16 @@
+const password = "Matt123";
+const userInput = "Anything";
+const administrator = "Anything";
+let response = " ";
+
+if (password === userInput) {
+    response = "Login successful";
+} else if (userInput === administrator) {
+    response = "Welcome to the site";
+}
+else {
+    response = "Please try again";
+}
+console.log(response);
+
+
diff --git a/Sprint-3/1-key-errors/0.js b/Sprint-3/1-key-errors/0.js
index 653d6f5a0..552419761 100644
--- a/Sprint-3/1-key-errors/0.js
+++ b/Sprint-3/1-key-errors/0.js
@@ -1,13 +1,23 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  ======> write your prediction here: I predict that the code should cut out, and make the first letter of the string an uppercase letter,
+//  then add every letters that comes after
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
-function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
-  return str;
-}
+// function capitalise(str) {
+//  let str= `${str[0].toUpperCase()}${str.slice(1)}`
+//   return str;
+// }
+
+
+// =============> write your explanation here: The error read "SyntaxError: Identifier 'str' has already been declared",
+//  this is as a result of having two variables with same name. The error occoured in this code because the variable "str" has been decleared twice
 
-// =============> write your explanation here
 // =============> write your new code here
+
+function capitalise(str) {
+ let str2= `${str[0].toUpperCase()}${str.slice(1)}`
+  return str2;
+}
+console.log(capitalise("money"))
\ No newline at end of file
diff --git a/Sprint-3/1-key-errors/1.js b/Sprint-3/1-key-errors/1.js
index f2d56151f..6f0b04f61 100644
--- a/Sprint-3/1-key-errors/1.js
+++ b/Sprint-3/1-key-errors/1.js
@@ -1,20 +1,38 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// Answer below:
+// A syntax error will occur for two reasons, first because there variable  const "decimalNumber" being redecleared 
+// The second reason is because the function "convertToPercentage" is not called correctly.
 
-// Try playing computer with the example to work out what is going on
+// =============> write your prediction here: 
+// Answer below:
+// I predicted that the code will not work because of the variable (decimalNumber) inside the function,
+// Also because the console.log(decimalNumber) is just a name that exist inside the function
 
-function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
-  const percentage = `${decimalNumber * 100}%`;
 
-  return percentage;
-}
+// Try playing computer with the example to work out what is going on
+
+// function convertToPercentage(decimalNumber) {
+//   const decimalNumber = 0.5;
+//   const percentage = `${decimalNumber * 100}%`;
 
-console.log(decimalNumber);
+//   return percentage;
+// }
+// console.log(decimalNumber);
 
 // =============> write your explanation here
+// Answer:
+
+// const decimalNumber redeclares the parameter name which causes a SyntaxError. 
+// also console.log(decimalNumber) outside fails because the parameter only exists inside the function"
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+
+  return percentage;
+}
+console.log(convertToPercentage(10.5));
\ No newline at end of file
diff --git a/Sprint-3/1-key-errors/2.js b/Sprint-3/1-key-errors/2.js
index aad57f7cf..3c5f20756 100644
--- a/Sprint-3/1-key-errors/2.js
+++ b/Sprint-3/1-key-errors/2.js
@@ -1,20 +1,31 @@
 
 // Predict and explain first BEFORE you run any code...
+// Answer below:
+// The code will not work because the placeholder variable (3) should be an actual name like "num"
+
 
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
 
-function square(3) {
-    return num * num;
-}
+// function square(3) {
+//     return num * num;
+// }
 
 // =============> write the error message here
+// SyntaxError: Unexpected number
 
 // =============> explain this error message here
+// The error message explains the error in the function parameter (3), the function expects a name parameter instead of a number.
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
 
+function square(num) {
+    return num * num;
+}
+console.log(square(10))
+
+
 
diff --git a/Sprint-3/2-mandatory-debug/0.js b/Sprint-3/2-mandatory-debug/0.js
index b27511b41..9216f69ec 100644
--- a/Sprint-3/2-mandatory-debug/0.js
+++ b/Sprint-3/2-mandatory-debug/0.js
@@ -1,14 +1,24 @@
 // Predict and explain first...
+// Answer below:
+// The code needs a value inside the console.log function to multiply, but no value was useed to replace the placeholder parameters
+// It should be an error, no value to return
 
 // =============> write your prediction here
 
-function multiply(a, b) {
-  console.log(a * b);
-}
+// function multiply(a, b) {
+//   console.log(a * b);
+// }
+// console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
-console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
 // =============> write your explanation here
+// Answer below:
+// The original logs the product instead of returning it, so the function call inside the template string gives undefined
 
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+
+function multiply(a, b) {
+  return a * b
+}
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
diff --git a/Sprint-3/2-mandatory-debug/1.js b/Sprint-3/2-mandatory-debug/1.js
index 37cedfbcf..800cf59a7 100644
--- a/Sprint-3/2-mandatory-debug/1.js
+++ b/Sprint-3/2-mandatory-debug/1.js
@@ -1,13 +1,21 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// Code will not work because the paremeters should be on same line as return
 
-function sum(a, b) {
-  return;
-  a + b;
-}
+// function sum(a, b) {
+//   return;
+//   a + b;
+// }
 
-console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
+// console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
 // =============> write your explanation here
+// The errors in this codes is the semi-colon in front of the return and the placeholder parameters not on same line as the return
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+
+function sum(a, b) {
+  return a + b;
+}
+
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
diff --git a/Sprint-3/2-mandatory-debug/2.js b/Sprint-3/2-mandatory-debug/2.js
index 57d3f5dc3..4571f53fa 100644
--- a/Sprint-3/2-mandatory-debug/2.js
+++ b/Sprint-3/2-mandatory-debug/2.js
@@ -2,23 +2,48 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+// Answer below:
+// There is a constant variable num with value 103, the code should print last digit of the constant variable.
 
-const num = 103;
+// const num = 103;
 
-function getLastDigit() {
-  return num.toString().slice(-1);
-}
+// function getLastDigit() {
+//   return num.toString().slice(-1);
+// }
 
-console.log(`The last digit of 42 is ${getLastDigit(42)}`);
-console.log(`The last digit of 105 is ${getLastDigit(105)}`);
-console.log(`The last digit of 806 is ${getLastDigit(806)}`);
+// console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+// console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+// console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // Now run the code and compare the output to your prediction
 // =============> write the output here
+// Answer below:
+// The last digit of 42 is 3
+// The last digit of 105 is 3
+// The last digit of 806 is 3
+
+
 // Explain why the output is the way it is
 // =============> write your explanation here
+// Answer below:
+// The code kept repeating same value for all log because of the constant variable decleared before the function and used inside the function.
+
 // Finally, correct the code to fix the problem
 // =============> write your new code here
 
+function getLastDigit(num) {
+  return num.toString().slice(-1);
+}
+
+console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+console.log(`The last digit of 806 is ${getLastDigit(806)}`);
+
+
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem
+
+// Answer below:
+
+// The global constant variable outside the function has affected the code and caused it to always reference the last number of the global variable
+// To fix this, getLastDigit needed its own parameter, so num comes from whatever you pass in
\ No newline at end of file
diff --git a/Sprint-3/3-mandatory-implement/1-bmi.js b/Sprint-3/3-mandatory-implement/1-bmi.js
index 58b1085f1..4b6398b12 100644
--- a/Sprint-3/3-mandatory-implement/1-bmi.js
+++ b/Sprint-3/3-mandatory-implement/1-bmi.js
@@ -15,5 +15,8 @@
 // It should return a string of their Body Mass Index to 1 decimal place
 
 function calculateBMI(weight, height) {
+  const bmi = weight / (height * height)
+  return bmi.toFixed(1)
   // return the BMI of someone based off their weight and height
 }
+console.log(`Your BMI is ${calculateBMI(100, 1.62)}`)
diff --git a/Sprint-3/3-mandatory-implement/2-cases.js b/Sprint-3/3-mandatory-implement/2-cases.js
index 5b0ef77ad..b404d1ea0 100644
--- a/Sprint-3/3-mandatory-implement/2-cases.js
+++ b/Sprint-3/3-mandatory-implement/2-cases.js
@@ -14,3 +14,9 @@
 // You will need to come up with an appropriate name for the function
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
+
+function upperCase(str) {
+    const returnUpperCase = str.toUpperCase().replaceAll(" ", "_")
+    return returnUpperCase
+}
+console.log(upperCase("what is your name mr man? "))
\ No newline at end of file
diff --git a/Sprint-3/3-mandatory-implement/3-to-pounds.js b/Sprint-3/3-mandatory-implement/3-to-pounds.js
index 10754da73..2ca524252 100644
--- a/Sprint-3/3-mandatory-implement/3-to-pounds.js
+++ b/Sprint-3/3-mandatory-implement/3-to-pounds.js
@@ -4,3 +4,43 @@
 // You will need to declare a function called toPounds with an appropriately named parameter.
 
 // You should call this function a number of times to check it works for different inputs
+
+
+// const penceString = "399p";
+
+// const penceStringWithoutTrailingP = penceString.substring(
+//   0,
+//   penceString.length - 1
+// );
+
+// const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+// const pounds = paddedPenceNumberString.substring(
+//   0,
+//   paddedPenceNumberString.length - 2
+// );
+
+// const pence = paddedPenceNumberString
+//   .substring(paddedPenceNumberString.length - 2)
+//   .padEnd(2, "0");
+
+// console.log(`£${pounds}.${pence}`);
+
+
+function toPounds(inPounds) {
+    const penceStringWithoutTrailingP = inPounds.substring(
+  0,
+  inPounds.length - 1
+);
+
+const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+const pounds = paddedPenceNumberString.substring(
+  0,
+  paddedPenceNumberString.length - 2
+);
+
+const pence = paddedPenceNumberString
+  .substring(paddedPenceNumberString.length - 2)
+  .padEnd(2, "0");
+return `£${pounds}.${pence}`;
+}
+console.log(toPounds("599p"))
\ No newline at end of file
diff --git a/Sprint-3/4-mandatory-interpret/time-format.js b/Sprint-3/4-mandatory-interpret/time-format.js
index c0dd9c9a5..58c1dc52b 100644
--- a/Sprint-3/4-mandatory-interpret/time-format.js
+++ b/Sprint-3/4-mandatory-interpret/time-format.js
@@ -1,11 +1,15 @@
 function pad(num) {
+  // console.log(num)
   let numString = num.toString();
+  // console.log(numString, "numstr")
   while (numString.length < 2) {
     numString = "0" + numString;
   }
+  //  console.log(numString, "FULLNUM")
   return numString;
 }
 
+
 function formatTimeDisplay(seconds) {
   const remainingSeconds = seconds % 60;
   const totalMinutes = (seconds - remainingSeconds) / 60;
@@ -14,6 +18,10 @@ function formatTimeDisplay(seconds) {
 
   return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
 }
+console.log(formatTimeDisplay(61))
+
+
+
 
 // You will need to play computer with this example - use the Python Visualiser https://pythontutor.com/visualize.html#mode=edit
 // to help you answer these questions
@@ -21,18 +29,27 @@ function formatTimeDisplay(seconds) {
 // Questions
 
 // a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// =============> write your answer here 
+// Answer below:
+// Pad runs once for "totalHours", once "remainingMinutes" and once for "remainingSeconds" in total pad is called 3 times.
 
 // Call formatTimeDisplay with an input of 61, now answer the following:
 
 // b) What is the value assigned to num when pad is called for the first time?
-// =============> write your answer here
+// =============> write your answer here 
+// Answer below:
+// The first pad is pad(totalHours) and the value is 0
 
 // c) What is the return value of pad when it is called for the first time?
 // =============> write your answer here
+// The value is 0 plus the "0" added to it to make the value 00
 
 // d) What is the value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> write your answer here 
+// Answer below:
+// The last call is pad(remainingSeconds) and the value is 1
 
 // e) What is the return value of pad when it is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> write your answer here 
+// Answer below:
+// the return value initially is 1 and "0" was added to it in front to make the value 01
diff --git a/Sprint-3/5-stretch-extend/format-time.js b/Sprint-3/5-stretch-extend/format-time.js
index 32a32e66b..d7a71c282 100644
--- a/Sprint-3/5-stretch-extend/format-time.js
+++ b/Sprint-3/5-stretch-extend/format-time.js
@@ -2,24 +2,129 @@
 // Make sure to do the prep before you do the coursework
 // Your task is to write tests for as many different groups of input data or edge cases as you can, and fix any bugs you find.
 
+// function formatAs12HourClock(time) {
+//   const hours = Number(time.slice(0, 2));
+//   if (hours > 12) {
+//     return `${hours - 12}:00 pm`;
+//   }
+//   return `${time} am`;
+// }                                               
+// // console.log(formatAs12HourClock("10:15"));
+
+// // Early Morning: ================> assertion passed
+// let currentOutput = formatAs12HourClock("08:30");
+// let targetOutput = "08:30 am";
+// console.assert(
+//   currentOutput === targetOutput,
+//  `current output: ${currentOutput}, target output: ${targetOutput}`
+// );
+// console.log(formatAs12HourClock("08:30"))
+
+// // Mid-morning ==============> assertion passed
+// currentOutput = formatAs12HourClock("10:00");
+// targetOutput = "10:00 am";
+// console.assert(
+//   currentOutput === targetOutput,
+//  `current output: ${currentOutput}, target output: ${targetOutput}`
+// );
+// console.log(formatAs12HourClock("10.00"))
+
+// // Late morning ============> assertion passed
+// currentOutput = formatAs12HourClock("11:45");
+// targetOutput = "11:45 am";
+// console.assert(
+//   currentOutput === targetOutput,
+//  `current output: ${currentOutput}, target output: ${targetOutput}`
+// );
+// console.log(formatAs12HourClock("11.45"))
+
+
+// // Afternoon =============> assertion failed
+// let currentOutput2 = formatAs12HourClock("12:00");
+// let targetOutput2 = "12:00 pm";
+// console.assert(
+//   currentOutput2 === targetOutput2,
+//   `current output: ${currentOutput2}, target output: ${targetOutput2}`
+// );
+// console.log(formatAs12HourClock("12:00"))
+
+// // Early afternoon =============> assertion passed
+// currentOutput2 = formatAs12HourClock("14:00");
+// targetOutput2 = "02:00 pm";
+// console.assert(
+//   currentOutput2 === targetOutput2,
+//   `current output: ${currentOutput2}, target output: ${targetOutput2}`
+// );
+// console.log(formatAs12HourClock("14:00"))
+
+// // Mid afternoon =============> time display doesn't correspond
+// currentOutput2 = formatAs12HourClock("15:30");
+// targetOutput2 = "03:30 pm";
+// console.assert(
+//   currentOutput2 === targetOutput2,
+//   `current output: ${currentOutput2}, target output: ${targetOutput2}`
+// );
+// console.log(formatAs12HourClock("15:30"))
+
+// // Towards evening ==============> time display doesn't correspond
+// currentOutput2 = formatAs12HourClock("17:30");
+// targetOutput2 = "05:30 pm";
+// console.assert(
+//   currentOutput2 === targetOutput2,
+//   `current output: ${currentOutput2}, target output: ${targetOutput2}`
+// );
+// console.log(formatAs12HourClock("17:30"))
+
+// // Late night =============> assertion passed
+// currentOutput2 = formatAs12HourClock("23:00");
+// targetOutput2 = "11:00 pm";
+// console.assert(
+//   currentOutput2 === targetOutput2,
+//   `current output: ${currentOutput2}, target output: ${targetOutput2}`
+// );
+// console.log(formatAs12HourClock("23:00"))
+
+
+// Test result:
+// Hours and Minutes worked in the AM function for different time test.
+// 12:00 in the afternoon doesn't function correctly
+// 00:00 mid-night doesnt work
+// Minutes in the PM are not working.
+
+// To fix bug:
+
 function formatAs12HourClock(time) {
   const hours = Number(time.slice(0, 2));
+  const minutes = time.slice(3, 5);
+
+  if (hours === 0) {
+    return `12:${minutes} am`
+  }
+  if (hours === 12) {
+    return `12:${minutes} pm`;
+  }
   if (hours > 12) {
-    return `${hours - 12}:00 pm`;
+    return `${hours - 12}:${minutes} pm`;
   }
+  
+
   return `${time} am`;
 }
 
-const currentOutput = formatAs12HourClock("08:00");
-const targetOutput = "08:00 am";
+const currentOutput = formatAs12HourClock("01:00");
+const targetOutput = "01:00 am";
 console.assert(
   currentOutput === targetOutput,
-  `current output: ${currentOutput}, target output: ${targetOutput}`
+ `current output: ${currentOutput}, target output: ${targetOutput}`
 );
+console.log(formatAs12HourClock("01:00"))
+
+const currentOutput2 = formatAs12HourClock("19:30");
+const targetOutput2 = "7:30 pm";
 
-const currentOutput2 = formatAs12HourClock("23:00");
-const targetOutput2 = "11:00 pm";
 console.assert(
   currentOutput2 === targetOutput2,
   `current output: ${currentOutput2}, target output: ${targetOutput2}`
 );
+
+console.log(formatAs12HourClock("19:30"));