diff --git a/index.js b/index.js
index 294f6b2..a6da46c 100644
--- a/index.js
+++ b/index.js
@@ -8,12 +8,10 @@ const s4 = "bread";
 const s5 = "and";
 
 // Concatenate the string variables into one new string
-
+let tongueTwister = `${s1} ${s2} ${s3} ${s4} ${s5} ${s3} ${s2} ${s1} ${s4}`;
 
 // Print out the concatenated string
-
-
-
+console.log(tongueTwister);
 
 /*******************************************
     Iteration 1.2 | Camel Tail
@@ -22,36 +20,34 @@ const part1 = "java";
 const part2 = "script";
 
 // Convert the last letter of part1 and part2 to uppercase and concatenate the strings
+const word1Len = part1.length;
+const word2Len = part2.length;
 
-
+let result = part1.slice(0, word1Len - 1) + part1[word1Len - 1].toUpperCase();
+result += part2.slice(0, word2Len - 1) + part2[word2Len - 1].toUpperCase();
 // Print the cameLtaiL-formatted string
-
-
-
+console.log(result);
 
 /*******************************************
     Iteration 2.1 | Calculate Tip
 *******************************************/
 const billTotal = 84;
+const tipPer = 15;
 
 // Calculate the tip (15% of the bill total)
-
-
+const tipAmount = (billTotal * tipPer) / 100;
 // Print out the tipAmount
-
-
-
+console.log(tipAmount);
 
 /*******************************************
     Iteration 2.2 | Generate Random Number
 *******************************************/
 
 // Generate a random integer between 1 and 10 (inclusive)
-
-
+const randomNumber = Math.ceil(Math.random() * 10);
 // Print the generated random number
 
-
+console.log(randomNumber);
 
 /*******************************************
     Iteration 3.1 | Booleans
@@ -61,16 +57,16 @@ 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