diff --git a/index.js b/index.js
index 294f6b2..e1c7486 100644
--- a/index.js
+++ b/index.js
@@ -9,10 +9,11 @@ const s5 = "and";
 
 // Concatenate the string variables into one new string
 
+const tongueTwister = s1 + " " + s2 + " " + s3 + " " + s4 + " " + s5 + " " + s3 + " " + s2 + " " + s1 + " " + s4
 
 // Print out the concatenated string
 
-
+console.log(tongueTwister)
 
 
 /*******************************************
@@ -23,23 +24,33 @@ const part2 = "script";
 
 // Convert the last letter of part1 and part2 to uppercase and concatenate the strings
 
+const lastChar1 = part1.charAt(part1.length - 1).toUpperCase()
+const rest1 = part1.slice(0, -1)
 
-// Print the cameLtaiL-formatted string
+const lastChar2 = part2.charAt(part2.length - 1).toUpperCase()
+const rest2 = part2.slice(0, -1)
 
+const result = rest1 + lastChar1 + rest2 + lastChar2
+
+// Print the cameLtaiL-formatted string
 
+console.log(result)
 
 
 /*******************************************
     Iteration 2.1 | Calculate Tip
 *******************************************/
-const billTotal = 84;
+const billTotal = 84
 
 // Calculate the tip (15% of the bill total)
 
+const tipAmountEstipulated = 0.15
 
-// Print out the tipAmount
+const tipAmount = billTotal * tipAmountEstipulated
 
+// Print out the tipAmount
 
+console.log(tipAmount)
 
 
 /*******************************************
@@ -48,10 +59,11 @@ const billTotal = 84;
 
 // Generate a random integer between 1 and 10 (inclusive)
 
+const randomNumber = Math.floor(Math.random() * 10) + 1
 
 // Print the generated random number
 
-
+console.log(randomNumber)
 
 /*******************************************
     Iteration 3.1 | Booleans
@@ -61,16 +73,16 @@ const a = true;
 const b = false;
 
 // Try and guess the output of the below expressions first and write your answers down:
-const expression1 = a && b;
+const expression1 = a && b; // false
 
-const expression2 = a || b;
+const expression2 = a || b; // true
 
-const expression3 = !a && b;
+const expression3 = !a && b; //false
 
-const expression4 = !(a && b);
+const expression4 = !(a && b); //true
 
-const expression5 = !a || !b;
+const expression5 = !a || !b; //true
 
-const expression6 = !(a || b);
+const expression6 = !(a || b); //false
 
-const expression7 = a && a;
\ No newline at end of file
+const expression7 = a && a; //true
\ No newline at end of file