diff --git a/arrays.js b/arrays.js
index 37faed2..b7aff00 100644
--- a/arrays.js
+++ b/arrays.js
@@ -17,7 +17,12 @@ Expected Output:
 // ✍️ Solve it here ✍️
 
 
+const inventory = ["Apples", "Bread", "Milk", "Eggs"];
+
+inventory.push("Oranges", "Bananas");
+inventory.shift();
 
+console.log("Updated inventory:", inventory);
 
 
 /*
@@ -41,7 +46,15 @@ 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.`;
+  }
+}
 
 
 
@@ -67,7 +80,33 @@ 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 playerFound = false;
+  for (let i = 0; i < topScorers.length; i++) {
+    if (topScorers[i].name === playerName) {
+      topScorers[i].score += scoreToAdd;
+      playerFound = true;
+      break;
+    }
+  }
+  if (!playerFound) {
+    topScorers.push({ name: playerName, score: scoreToAdd });
+  }
+}
+
+function printLeaderboard() {
+  topScorers.sort((a, b) => b.score - a.score);
+  console.log("Top Scorers Leaderboard:");
+  topScorers.forEach(player => {
+    console.log(`${player.name}: ${player.score}`);
+  });
+}
 
 
 
diff --git a/callbacks.js b/callbacks.js
index 3fadb3f..12e76bb 100644
--- a/callbacks.js
+++ b/callbacks.js
@@ -18,7 +18,13 @@ Expected Output:
 
 // ✍️ Solve it here ✍️
 
+function welcomeCallback(name) {
+  console.log(`Welcome, ${name}!`);
+}
 
+function sendMessage(userName, callback) {
+  callback(userName);
+}
 
 
 /*
@@ -49,7 +55,19 @@ Expected Output:
 // ✍️ Solve it here ✍️
 
 
+function evaluateTemperature(temperature) {
+  if (temperature > 30) {
+    console.log(`${temperature}°C is Hot.`);
+  } else if (temperature >= 15 && temperature <= 30) {
+    console.log(`${temperature}°C is Warm.`);
+  } else {
+    console.log(`${temperature}°C is Cold.`);
+  }
+}
 
+function checkTemperature(temperatureValue, callback) {
+  callback(temperatureValue);
+}
 
 /*
 STRETCH: Task 3: Quiz Evaluator 📚📚📚📚
@@ -73,3 +91,27 @@ Expected Output:
 */
 
 // ✍️ Solve it here ✍️
+function evaluateQuizAnswer(question, correctAnswer, userAnswer) {
+  if (userAnswer === correctAnswer) {
+    console.log("Correct!");
+  } else {
+    console.log(`Incorrect. The correct answer is ${correctAnswer}.`);
+  }
+}
+
+function evaluateAnswer(question, correctAnswer, callback) {
+  // The problem description implies a user's answer needs to be passed to the callback.
+  // Since there's no mechanism for user input in this context,
+  // I'll demonstrate with two hardcoded user answers as per the example.
+  // In a real scenario, 'userAnswer' would come from actual user interaction.
+
+  // Example for correct answer
+  const userAnswerCorrect = "10";
+  console.log(`Question: ${question}`); // Added to clarify output
+  callback(question, correctAnswer, userAnswerCorrect);
+
+  // Example for incorrect answer
+  const userAnswerIncorrect = "15";
+  console.log(`Question: ${question}`); // Added to clarify output
+  callback(question, correctAnswer, userAnswerIncorrect);
+}
\ No newline at end of file
diff --git a/objects.js b/objects.js
index e2426e9..9ac11cd 100644
--- a/objects.js
+++ b/objects.js
@@ -30,7 +30,20 @@ Expected Output:
 
 // ✍️ Solve it here ✍️
 
+const gamerProfile = {
+  username: "ShadowSlayer",
+  level: 5,
+  isOnline: false
+};
 
+function updateOnlineStatus(profile, status) {
+  profile.isOnline = status;
+  if (profile.isOnline) {
+    console.log(`${profile.username} is now online.`);
+  } else {
+    console.log(`${profile.username} is now offline.`);
+  }
+}
 
 /*
 Task 2: Dress Inventory Checker 👗 👗 👗 👗 👗
@@ -64,7 +77,19 @@ Expected Output:
 
 // ✍️ Solve it here ✍️
 
+const dress = {
+  name: "Evening Gown",
+  size: "M",
+  inStock: true
+};
 
+function checkAvailability(dressObject) {
+  if (dressObject.inStock) {
+    console.log(`${dressObject.name} is available in size ${dressObject.size}.`);
+  } else {
+    console.log(`${dressObject.name} is out of stock.`);
+  }
+}
 
 /*
 Task 3: Supercar Feature Adder 🚗 🚗 🚗 🚗
@@ -104,3 +129,22 @@ Features:
 */
 
 // ✍️ Solve it here ✍️
+const supercar = {
+  model: "Ferrari SF90",
+  price: 500000,
+  features: {
+    color: "Red"
+  }
+};
+
+function addFeature(car, featureName) {
+  car.features[featureName] = true;
+  console.log(`${featureName} has been added to ${car.model}.`);
+}
+
+// After calling addFeature (e.g., addFeature(supercar, "turbo");)
+// Use this loop to print features:
+// console.log("Features:");
+// for (const feature in supercar.features) {
+//   console.log(`- ${feature}: ${supercar.features[feature]}`);
+// }