diff --git a/arrays.js b/arrays.js
index 37faed2..27e7a54 100644
--- a/arrays.js
+++ b/arrays.js
@@ -17,7 +17,13 @@ Expected Output:
 // ✍️ Solve it here ✍️
 
 
+const inventory = ["Aple", "Bread", "Milk" , "Eggs"];
 
+inventory.push ("Orange" , "Bananas");
+
+inventory.shift();
+
+console.log ("Updated inventory" , inventory)
 
 
 /*
@@ -41,8 +47,21 @@ Output: "Ali is present."
 // ✍️ Write your function here ✍️
 
 
+const students = ["Ali", "Fatima", "Hassan", "Layla"];
+
+function isPresent (name) {
+
+  if (students.includes(name)) {
+
+    return `${name} is present`;
 
+  } else {
+    
+    return `${name} is absent`;
+  }
+}
 
+console.log(isPresent("Ali"));
 
 
 /*
@@ -67,8 +86,45 @@ 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) {
+
+  const player = topScorers.find(p => p.name === playerName);
+
+  if (player) {
+
+    player.score += scoreToAdd;
+
+  } else {
+
+    topScorers.push({ name: playerName, score: scoreToAdd });
+  }
+}
+
+function printLeaderboard() {
+
+  const sortedLeaderboard = [...topScorers].sort((a, b) => b.score - a.score);
+  
+  console.log("Leaderboard:");
+
+  sortedLeaderboard.forEach((p, i) => {
 
+    console.log(`${i + 1}. ${p.name} — ${p.score}`);
+    
+  });
+}
 
+printLeaderboard();
+  
+  
 
 
 
diff --git a/callbacks.js b/callbacks.js
index 3fadb3f..f4c3161 100644
--- a/callbacks.js
+++ b/callbacks.js
@@ -19,8 +19,20 @@ Expected Output:
 // ✍️ Solve it here ✍️
 
 
+function theCallBackFunction(name) {
+  
+  console.log(`Welcome, ${name}`);
+}
 
 
+function sendMessage (userName, callback) {
+  
+  callback(userName);
+}
+
+
+sendMessage("Amina", theCallBackFunction);
+
 /*
 Task 2: Temperature Checker 🌡️🌡️🌡️🌡️
 
@@ -48,7 +60,32 @@ Expected Output:
 
 // ✍️ Solve it here ✍️
 
-
+function checkTemperature(temperature, callback) {
+  
+  callback(temperature);
+}
+
+function temperatureMessage(temperature) {
+  
+  if (temperature > 30) {
+    
+    console.log(`${temperature} is hot`);
+  } 
+  else if (temperature > 15 & temperature < 30) {
+    
+    console.log(`${temperature} is warm`);
+  } 
+  else {
+    
+    console.log(`${temperature} is cold`);
+  }
+}
+
+checkTemperature(35, temperatureMessage);
+
+checkTemperature(22, temperatureMessage);
+
+checkTemperature(10, temperatureMessage);
 
 
 /*
diff --git a/index.html b/index.html
index 1104b64..698f139 100644
--- a/index.html
+++ b/index.html
@@ -4,6 +4,8 @@
     <body>
         <h1>Look at the console to see the results</h1>
 
-        <!-- Before starting, add the javascript files in this html fie -->
+       <script src = "arrays.sj"></script>
+       <script src = "callbacks.sj"></script>
+       <script src = "objects.js"></script>
     </body>
 </html>
\ No newline at end of file
diff --git a/objects.js b/objects.js
index e2426e9..74cc970 100644
--- a/objects.js
+++ b/objects.js
@@ -30,6 +30,33 @@ Expected Output:
 
 // ✍️ Solve it here ✍️
 
+const gamerProfile = {
+     
+   username: "ShadowSlayer",
+
+   level: 5,
+
+   isOnline: false
+};
+
+
+function updateOnlineStatus(Profile, status) {
+
+   Profile.isOnline = status;
+
+   if (status) {
+
+       console.log('${Profile.username} is now online.');
+
+   } else {
+
+         
+         console.log('${Profile.username} is now offline.');
+   }
+}
+
+
+updateOnlineStatus(gamerProfile, true);
 
 
 /*
@@ -64,8 +91,28 @@ Expected Output:
 
 // ✍️ Solve it here ✍️
 
+const dress = {
+
+  name: "Evening Gown",
+
+  size: "M",
+
+  inStock: true
+};
+
+function checkAvailability(dress) {
+
+  if (dress.inStock) {
+
+    console.log(`${dress.name} is available in size ${dress.size}.`);
 
+  } else {
 
+    console.log(`${dress.name} is out of stock.`);
+  }
+}
+
+checkAvailability(dress);
 /*
 Task 3: Supercar Feature Adder 🚗 🚗 🚗 🚗
 
@@ -104,3 +151,30 @@ Features:
 */
 
 // ✍️ Solve it here ✍️
+
+const supercar = {
+
+   model: "ferrari sf90",
+
+   price: 500000,
+
+   features: {
+
+      color: "red"
+   }
+};
+
+function addFeature(supercar,featureName) {
+
+   supercar.features[ featureName]= true;
+   
+   console.log(`${featureName.charAt(0).toUpperCase() + featureName.slice(1)} has been added to ${supercar.model}.`);
+}
+addFeature(supercar,"turbo");
+
+console.log("features:");
+
+for (let feature in supercar.feature) {
+
+   console.log('${feature}: ${supercar.feartures[festure]}');
+}
\ No newline at end of file
