diff --git a/index.js b/index.js
index 294f6b2..4dfb7b9 100644
--- a/index.js
+++ b/index.js
@@ -9,11 +9,10 @@ const s5 = "and";
 
 // Concatenate the string variables into one new string
 
-
 // Print out the concatenated string
 
-
-
+const tongTwister = `${s1} ${s2} ${s3} ${s4} ${s5} ${s3} ${s2} ${s4}`;
+console.log(tongTwister);
 
 /*******************************************
     Iteration 1.2 | Camel Tail
@@ -21,38 +20,39 @@ const s5 = "and";
 const part1 = "java";
 const part2 = "script";
 
-// Convert the last letter of part1 and part2 to uppercase and concatenate the strings
-
+const lastLetter1 = part1[3].toUpperCase();
+const lastLetter2 = part2[5].toUpperCase();
 
-// Print the cameLtaiL-formatted string
+const firstP1 = part1.slice(-4);
+const firstP2 = part2.slice(-5);
 
+console.log(`${firstP1}${lastLetter1}${firstP2}${lastLetter2}`);
 
+// Convert the last letter of part1 and part2 to uppercase and concatenate the strings
 
+// Print the cameLtaiL-formatted string
 
 /*******************************************
     Iteration 2.1 | Calculate Tip
 *******************************************/
-const billTotal = 84;
 
 // Calculate the tip (15% of the bill total)
 
-
 // Print out the tipAmount
 
+const billTotal = 84;
+let tipAmount = billTotal * 0.15;
 
-
-
+console.log(tipAmount);
 /*******************************************
     Iteration 2.2 | Generate Random Number
 *******************************************/
-
+let ramdomNumber = Math.floor(Math.random() * 11);
+console.log(ramdomNumber);
 // Generate a random integer between 1 and 10 (inclusive)
 
-
 // Print the generated random number
 
-
-
 /*******************************************
     Iteration 3.1 | Booleans
 *******************************************/
@@ -62,15 +62,24 @@ const b = false;
 
 // Try and guess the output of the below expressions first and write your answers down:
 const expression1 = a && b;
-
+// false
 const expression2 = a || b;
-
+// true
 const expression3 = !a && b;
-
+// false
 const expression4 = !(a && b);
-
+//true
 const expression5 = !a || !b;
-
+//true
 const expression6 = !(a || b);
-
-const expression7 = a && a;
\ No newline at end of file
+//false
+const expression7 = a && a;
+// true
+
+console.log(expression1);
+console.log(expression2);
+console.log(expression3);
+console.log(expression4);
+console.log(expression5);
+console.log(expression6);
+console.log(expression7);