diff --git a/index.js b/index.js
index 294f6b2..6a92f93 100644
--- a/index.js
+++ b/index.js
@@ -8,10 +8,10 @@ const s4 = "bread";
 const s5 = "and";
 
 // Concatenate the string variables into one new string
-
+const s6 = s1 + s2 + s3 + s4 + s5
 
 // Print out the concatenated string
-
+// console.log(s6);
 
 
 
@@ -22,11 +22,18 @@ const part1 = "java";
 const part2 = "script";
 
 // Convert the last letter of part1 and part2 to uppercase and concatenate the strings
+const lastChar1 = part1.length - 1;
+const lastChar2 = part2.length - 1;
 
+const updated1 = part1[lastChar1].toUpperCase();
+const updated2 = part2[lastChar2].toUpperCase();
 
-// Print the cameLtaiL-formatted string
+const final = part1.slice(0, lastChar1)+ updated1 + part2.slice(0, lastChar2) + updated2;
 
 
+// Print the cameLtaiL-formatted string
+
+// console.log(final);
 
 
 /*******************************************
@@ -36,9 +43,11 @@ const billTotal = 84;
 
 // Calculate the tip (15% of the bill total)
 
+const tipAmount = billTotal * (15/100)
 
 // Print out the tipAmount
 
+// console.log(tipAmount);
 
 
 
@@ -48,10 +57,11 @@ const billTotal = 84;
 
 // Generate a random integer between 1 and 10 (inclusive)
 
+const random = Math.floor(Math.random() * 10 + 1);
 
 // Print the generated random number
 
-
+// console.log(random);
 
 /*******************************************
     Iteration 3.1 | Booleans
@@ -62,15 +72,26 @@ 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);
+*/
\ No newline at end of file