diff --git a/Sprint-2/1-key-errors/0.js b/Sprint-2/1-key-errors/0.js
index 653d6f5a0..70254cdf0 100644
--- a/Sprint-2/1-key-errors/0.js
+++ b/Sprint-2/1-key-errors/0.js
@@ -1,13 +1,20 @@
 // Predict and explain first...
 //  =============> write your prediction here
 
+// The code will throw an error because the variable `str` is being declared twice in the same scope.
+
 // 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;
 }
+capitalise("hello,this is a test");
+
+//
 
 // =============> write your explanation here
 // =============> write your new code here
+//// The error occurs because the variable `str`is declared twice in the same scope,which is not allowed in JavaScript.
\ No newline at end of file
diff --git a/Sprint-2/1-key-errors/1.js b/Sprint-2/1-key-errors/1.js
index f2d56151f..58d69cff0 100644
--- a/Sprint-2/1-key-errors/1.js
+++ b/Sprint-2/1-key-errors/1.js
@@ -2,6 +2,8 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
+//Decimal number is undefined
+//we ll got syntax error as we are declaring a new variable
 
 // Try playing computer with the example to work out what is going on
 
@@ -18,3 +20,11 @@ console.log(decimalNumber);
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+function convertToPercentage(decimalNumber) {
+
+    const percentage = `${decimalNumber * 100}%`;
+
+    return percentage;
+   }
+
+   result = console.log(convertToPercentage(0.5));
\ No newline at end of file
diff --git a/Sprint-2/1-key-errors/2.js b/Sprint-2/1-key-errors/2.js
index aad57f7cf..adc36768b 100644
--- a/Sprint-2/1-key-errors/2.js
+++ b/Sprint-2/1-key-errors/2.js
@@ -5,16 +5,28 @@
 
 // =============> write your prediction of the error here
 
+//we will get an error bcs the parameter of the function need to string type not number so it can be something like num
+
 function square(3) {
     return num * num;
 }
 
 // =============> write the error message here
+//Output:
+
+/index.js:1
+function square(3) {
+                ^
 
+SyntaxError: Unexpected number
 // =============> explain this error message here
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
 
-
+//THe error message tells that we wrote a syntax that JavaScript does not understand.
+function square(num) {
+    return num * num;
+}
+result = console.log(square(3));
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-debug/0.js b/Sprint-2/2-mandatory-debug/0.js
index b27511b41..fba46cb3d 100644
--- a/Sprint-2/2-mandatory-debug/0.js
+++ b/Sprint-2/2-mandatory-debug/0.js
@@ -1,9 +1,15 @@
 // Predict and explain first...
 
 // =============> write your prediction here
-
+// What I predict is that the console.log which is outside the function will pass the parameters 10 and 32 to the function
+// Then the console.log(a * b) which is inside the function will print out 
+ // to the terminal the multiplication of a by b
 function multiply(a, b) {
-  console.log(a * b);
+  const multiplicationResult =  (a * b);
+  return multiplicationResult;
+
+
+  
 }
 
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
diff --git a/Sprint-2/2-mandatory-debug/1.js b/Sprint-2/2-mandatory-debug/1.js
index 37cedfbcf..4ebc9ae87 100644
--- a/Sprint-2/2-mandatory-debug/1.js
+++ b/Sprint-2/2-mandatory-debug/1.js
@@ -1,13 +1,16 @@
 // Predict and explain first...
 //  =============> write your prediction here
-
+// The code will not return the sum of the two numbers because the return statement is placed before the actual addition operation.
 function sum(a, b) {
-  return;
-  a + b;
+  return a + b;
+
+
 }
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
 // =============> write your explanation here
+//
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+//
diff --git a/Sprint-2/2-mandatory-debug/2.js b/Sprint-2/2-mandatory-debug/2.js
index 57d3f5dc3..2c5b07cd7 100644
--- a/Sprint-2/2-mandatory-debug/2.js
+++ b/Sprint-2/2-mandatory-debug/2.js
@@ -2,7 +2,7 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
-
+// The code will not retuen the last digit of the number because the function getLastDigit is not correctly defined to aacept the parameter.
 const num = 103;
 
 function getLastDigit() {
@@ -16,9 +16,19 @@ 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
 // Explain why the output is the way it is
+// Because every time we are passing the parameters we are actually using the num value and return it.
 // =============> write your explanation here
 // Finally, correct the code to fix the problem
 // =============> write your new code here
 
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem
+const num = 103;
+
+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)}`);
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-implement/1-bmi.js b/Sprint-2/3-mandatory-implement/1-bmi.js
index 17b1cbde1..bdbac2e48 100644
--- a/Sprint-2/3-mandatory-implement/1-bmi.js
+++ b/Sprint-2/3-mandatory-implement/1-bmi.js
@@ -15,5 +15,8 @@
 // It should return their Body Mass Index to 1 decimal place
 
 function calculateBMI(weight, height) {
-    // return the BMI of someone based off their weight and height
+   squareHeight =height * height;
+   bmi  = weight / squareHeight;
+    return bmi.0toFixed(1);
+    
 }
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-implement/2-cases.js b/Sprint-2/3-mandatory-implement/2-cases.js
index 5b0ef77ad..aa8720ef7 100644
--- a/Sprint-2/3-mandatory-implement/2-cases.js
+++ b/Sprint-2/3-mandatory-implement/2-cases.js
@@ -14,3 +14,7 @@
 // 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 upperSnakeCase(str) {
+  return (upperSnakeCase = str.replaceAll(" ", "_").toUpperCase());
+}
+console.log(upperSnakeCase("Congratulations having a boy! 🎉"));
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-implement/3-to-pounds.js b/Sprint-2/3-mandatory-implement/3-to-pounds.js
index 6265a1a70..d7b4978d9 100644
--- a/Sprint-2/3-mandatory-implement/3-to-pounds.js
+++ b/Sprint-2/3-mandatory-implement/3-to-pounds.js
@@ -4,3 +4,9 @@
 // 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
+
+function toPounds(kg) {
+    const pounds =kg *2.20462;
+    return pounds.toFixed(2);
+    
+}
\ No newline at end of file
diff --git a/Sprint-2/5-stretch-extend/format-time.js b/Sprint-2/5-stretch-extend/format-time.js
index 32a32e66b..096efa57a 100644
--- a/Sprint-2/5-stretch-extend/format-time.js
+++ b/Sprint-2/5-stretch-extend/format-time.js
@@ -23,3 +23,4 @@ console.assert(
   currentOutput2 === targetOutput2,
   `current output: ${currentOutput2}, target output: ${targetOutput2}`
 );
+//
\ No newline at end of file