diff --git a/arrays.js b/arrays.js
index 37faed2..0148813 100644
--- a/arrays.js
+++ b/arrays.js
@@ -15,9 +15,12 @@ Expected Output:
 */
 
 // ✍️ Solve it here ✍️
-
-
-
+/*
+const inventory = ["Apples", "Bread", "Milk", "Eggs"]
+inventory.push("Oranges","Banana")
+inventory.shift()
+console.log("Updated inventory" ,inventory)
+*/
 
 
 /*
@@ -40,9 +43,22 @@ Output: "Ali is present."
 
 // ✍️ Write your function here ✍️
 
+/*
+const students = ["Ali", "Fatima", "Hassan", "Layla"];
+
+function isPresent(stdName){
+  if(students.includes(stdName)){
+    console.log(`${stdName} is present`)
+  }
+  else{
+    console.log(`${stdName} is absent`)
+  }
 
+}
 
+isPresent("Ali")
 
+*/
 
 
 /*
@@ -67,11 +83,34 @@ Output: Sorted leaderboard with updated scores
 
 // ✍️ Write your functions here ✍️
 
+const topScorers = [
+  { name: "Messi", score: 5 },
+  { name: "Ronaldo", score: 3 },
+  { name: "Neymar", score: 4 }
+];
 
+function updateScore(playerName, scoreToAdd) {
 
+  let player = topScorers.find(p => p.name === playerName);
 
+  if (player) {
+    player.score = player.score + scoreToAdd;
+  } else {
+    topScorers.push({ name: playerName, score: scoreToAdd });
+  }
+}
 
+function printLeaderboard() {
+  const sorted = topScorers.sort(function(a, b) {
+    return b.score - a.score;
+  });
+  console.log("Sorted Leaderboard:");
+  console.log(sorted);
+}
 
+// Test
+updateScore("Haland", 7);
+printLeaderboard();
 
 /*
 STRETCH TASK: **The Ultimate Treasure Hunt** 🗺️💎🏴‍☠️
diff --git a/callbacks.js b/callbacks.js
index 3fadb3f..71c1192 100644
--- a/callbacks.js
+++ b/callbacks.js
@@ -18,7 +18,16 @@ Expected Output:
 
 // ✍️ Solve it here ✍️
 
+function theCallBackFunction(name) {
+  console.log(`Welcome, ${name} `);
+}
 
+function sendMessage(userName, callback) {
+  callback(userName);
+}
+
+// Test
+sendMessage("Amina", theCallBackFunction);
 
 
 /*
@@ -48,7 +57,24 @@ Expected Output:
 
 // ✍️ Solve it here ✍️
 
-
+function temperatureMessage(temp) {
+  if (temp > 30) {
+    console.log(temp + "°C is Hot.");
+  } else if (temp >= 15) {
+    console.log(temp + "°C is Warm.");
+  } else {
+    console.log(temp + "°C is Cold.");
+  }
+}
+
+function checkTemperature(value, callback) {
+  callback(value);
+}
+
+// Tests
+checkTemperature(35, temperatureMessage)
+checkTemperature(22, temperatureMessage)
+checkTemperature(10, temperatureMessage)
 
 
 /*
diff --git a/index.html b/index.html
index 1104b64..a9e903e 100644
--- a/index.html
+++ b/index.html
@@ -5,5 +5,8 @@
         <h1>Look at the console to see the results</h1>
 
         <!-- Before starting, add the javascript files in this html fie -->
+         <script src="arrays.js"></script>
+         <script src="callbacks.js"></script>
+         <script src="objects.js"></script>
     </body>
 </html>
\ No newline at end of file
diff --git a/objects.js b/objects.js
index e2426e9..e1b740d 100644
--- a/objects.js
+++ b/objects.js
@@ -30,6 +30,24 @@ Expected Output:
 
 // ✍️ Solve it here ✍️
 
+const gamerProfile = {
+  username: "ShadowSlayer",
+  level: 5,
+  isOnline: false
+};
+
+function updateOnlineStatus(profile, status) {
+  profile.isOnline = status;
+
+  if (status === true) {
+    console.log(profile.username + " is now online.");
+  } else {
+    console.log(profile.username + " is now offline.");
+  }
+}
+
+updateOnlineStatus(gamerProfile, false)
+
 
 
 /*
@@ -64,7 +82,20 @@ Expected Output:
 
 // ✍️ Solve it here ✍️
 
+const dress = {
+  name: "Evening Gown",
+  size: "M",
+  inStock: true
+};
 
+function checkAvailability(dressItem) {
+  if (dressItem.inStock === true) {
+    console.log(dressItem.name + " is available in size " + dressItem.size + ".");
+  } else {
+    console.log(dressItem.name + " is out of stock.");
+  }
+}
+checkAvailability(dress)
 
 /*
 Task 3: Supercar Feature Adder 🚗 🚗 🚗 🚗
@@ -104,3 +135,32 @@ Features:
 */
 
 // ✍️ Solve it here ✍️
+
+const supercar = {
+  model: "Ferrari SF90",
+  price: 500000,
+  features: {
+    color: "Red"
+  }
+};
+
+function addFeature(car, featureName) {
+  car.features[featureName] = true
+
+  const formattedName =
+    featureName.charAt(0).toUpperCase() + featureName.slice(1);
+
+  console.log(formattedName + " has been added to " + car.model + ".")
+}
+
+
+addFeature(supercar, "turbo");
+
+console.log("Features:");
+
+const featureKeys = Object.keys(supercar.features); 
+
+for (let i = 0; i < featureKeys.length; i++) {
+  const key = featureKeys[i];
+  console.log("- " + key + ": " + supercar.features[key]);
+}