diff --git a/src/main/java/org/Main.java b/src/main/java/org/Main.java
index 7a3d8c8..ae37dc2 100644
--- a/src/main/java/org/Main.java
+++ b/src/main/java/org/Main.java
@@ -1,5 +1,12 @@
 package org;
 
+import org.model.ElectricCar;
+import org.model.GasCar;
+import org.model.SportsCar;
+import org.model.Vehicle;
+import org.util.VehicleInspector;
+import org.behavior.Serviceable;
+
 public class Main {
     public static void main(String[] args) {
 
@@ -17,8 +24,15 @@ public class Main {
         //          ElectricCar tesla = new ElectricCar(...);
         // ============================================================
 
+        ElectricCar chevrolet = new ElectricCar("Chevrolet", "Bolt EV",
+                2023, 8500, 5, 65, 80) ;
 
+        GasCar toyota = new GasCar("Toyota", "Camery",
+                2022, 45000, 5, 65, "Petrol");
 
+        SportsCar lamborghini = new SportsCar("Lamborghini", "Huracan EVO",
+                 2022, 9500, 2, 55, "Petrol",
+                3.2) ;
 
 
         // ============================================================
@@ -32,8 +46,7 @@ public class Main {
         // as their parent type (Vehicle).
         // ============================================================
 
-
-
+        Vehicle[] vehicle = {chevrolet, toyota, lamborghini};
 
 
         // ============================================================
@@ -47,9 +60,11 @@ public class Main {
         //   behavior and can call inherited methods.
         // ============================================================
 
-
-
-
+        for (Vehicle v : vehicle)
+        {
+            v.basicInfo();
+            System.out.println();
+        }
 
         // ============================================================
         // TODO 4:
@@ -62,9 +77,11 @@ public class Main {
         //   • Show subclass‑specific inspection messages
         // ============================================================
 
-
-
-
+        for(Vehicle v : vehicle)
+        {
+           VehicleInspector.inspect(v) ;
+            System.out.println();
+        }
 
         // ============================================================
         // TODO 5:
@@ -80,9 +97,7 @@ public class Main {
         //
         // ============================================================
 
-
-
-
+        Serviceable[] serviceables = {chevrolet, toyota, lamborghini};
 
         // ============================================================
         // TODO 6:
@@ -106,6 +121,17 @@ public class Main {
         // Add blank lines between each item for readability.
         // ============================================================
 
+        for (Serviceable s : serviceables)
+        {
+            Vehicle v = (Vehicle) s;
+            if (s.needsService(v))
+            {
+                System.out.println(v.getBrand() + " " + v.getModel() + " need service !!");
+                s.performService();
+            }
+            else
+                System.out.println(v.getBrand() + "" + v.getModel() + "" + " does not need service :)");
+        }
 
 
 
@@ -118,9 +144,7 @@ public class Main {
         //
         // ============================================================
 
-
-
-
+        System.out.println("=== Workshop Completed ===");
 
     }
 }
diff --git a/src/main/java/org/model/Car.java b/src/main/java/org/model/Car.java
index cb81367..12effaf 100644
--- a/src/main/java/org/model/Car.java
+++ b/src/main/java/org/model/Car.java
@@ -19,12 +19,20 @@ public abstract class Car extends Vehicle implements Serviceable {
                double mileage, int seats) {
 
         // TODO: Call super constructor
+        super(brand, model, year, mileage);
         this.seats = seats;
     }
 
     // TODO: Override getEnergyType() → return "Unknown"
+    @Override
+    public String getEnergyType()
+    {
+        return "Unknown " ;
+    }
 
     // TODO: Override showDetails()
+    @Override
+    public abstract void showDetails();
 
     /*
      * Implement Serviceable methods:
@@ -37,4 +45,18 @@ public abstract class Car extends Vehicle implements Serviceable {
      * performService():
      * - Print: "General car service completed"
      */
+    @Override
+    public boolean needsService(Vehicle v)
+    {
+        if (this.getMileage() > 10000)
+        {
+            return true;
+        }
+        return false;
+    }
+    @Override
+    public void performService()
+    {
+        System.out.println("General car service completed ");
+    }
 }
diff --git a/src/main/java/org/model/ElectricCar.java b/src/main/java/org/model/ElectricCar.java
index ee9f5f9..75cef00 100644
--- a/src/main/java/org/model/ElectricCar.java
+++ b/src/main/java/org/model/ElectricCar.java
@@ -28,10 +28,57 @@ public class ElectricCar extends Car implements Chargeable {
     }
 
     // TODO: Override getEnergyType() → return "Electric"
+    @Override
+    public String getEnergyType()
+    {
+        return "Electric" ;
+    }
 
     // TODO: Override showDetails()
+    @Override
+    public void showDetails() {}
 
     // TODO: Implement charge(double amount)
     // Validate negative
     // Cap at 100
+    public void charge(double amount)
+    {
+        if (amount<0)
+        {
+            System.out.println("Error : The charge amount can not be negative. :)");
+            return;
+        }
+        if (amount==0)
+        {
+            System.out.println("Nothing for charge! :)");
+            return;
+        }
+        if (amount>0)
+        {
+            chargeLevel+=amount;
+            if(chargeLevel>100)
+            {
+                chargeLevel=100;
+                System.out.println("Charge is full :)");
+            }
+            else
+                System.out.println("fuel level : " + chargeLevel + "%");
+        }
+    }
+
+    @Override
+    public boolean needsService(Vehicle v)
+    {
+        if (this.getMileage() > 8000)
+            return true;
+        return false;
+    }
+
+    @Override
+    public void performService()
+    {
+        System.out.println("Battery system checked");
+        chargeLevel = 100 ;
+        System.out.println("Charge level : 100%");
+    }
 }
diff --git a/src/main/java/org/model/GasCar.java b/src/main/java/org/model/GasCar.java
index 58b3e45..f2d945f 100644
--- a/src/main/java/org/model/GasCar.java
+++ b/src/main/java/org/model/GasCar.java
@@ -28,10 +28,57 @@ public class GasCar extends Car implements Refuelable {
     }
 
     // TODO: Override getEnergyType() → return fuelType + " (Gas)"
+    @Override
+    public String getEnergyType()
+    {
+        return fuelType+" (Gas)" ;
+    }
 
     // TODO: Implement refuel(double amount)
     // Validate amount
     // Cap at 100
+    public void refuel(double amount)
+    {
+        if (amount<0)
+        {
+            System.out.println("Error : the refuel amount can not be negative. :)");
+            return;
+        }
+        if (amount==0)
+        {
+            System.out.println("Nothing for refuel! :)");
+            return;
+        }
+        if (amount>0)
+        {
+            fuelLevel+=amount;
+            if(fuelLevel>100)
+            {
+                fuelLevel=100;
+                System.out.println("Tank is full :)");
+            }
+            else
+                System.out.println("fuel level : " + fuelLevel + "%");
+        }
+    }
 
     // TODO: Override showDetails()
+    @Override
+    public void showDetails() {}
+
+    @Override
+    public boolean needsService(Vehicle v)
+    {
+        if (this.getMileage() > 12000)
+            return true;
+        return false;
+    }
+
+    @Override
+    public void performService()
+    {
+        System.out.println("Engine oil changed");
+        fuelLevel = 100 ;
+        System.out.println("fuel level : 100%");
+    }
 }
diff --git a/src/main/java/org/model/SportsCar.java b/src/main/java/org/model/SportsCar.java
index 2f8e459..81fc333 100644
--- a/src/main/java/org/model/SportsCar.java
+++ b/src/main/java/org/model/SportsCar.java
@@ -28,4 +28,24 @@ public class SportsCar extends GasCar {
     // Print header
     // Call super.showDetails()
     // Print acceleration time
+    public void showDetails()
+    {
+        System.out.println("====Sports Car Specifications====");
+        super.showDetails() ;
+        System.out.println("Acceleration : " + zeroToHundred + "s");
+    }
+
+    @Override
+    public boolean needsService(Vehicle v)
+    {
+        if ( this.getMileage() > 5000)
+            return true;
+        return false;
+    }
+
+    @Override
+    public void performService()
+    {
+        System.out.println("High-performance brake system checked");
+    }
 }
diff --git a/src/main/java/org/model/Vehicle.java b/src/main/java/org/model/Vehicle.java
index 70615a9..2467796 100644
--- a/src/main/java/org/model/Vehicle.java
+++ b/src/main/java/org/model/Vehicle.java
@@ -21,13 +21,41 @@ public abstract class Vehicle {
     }
 
     // TODO: Create getters for all fields
+    public String getBrand ()
+    {
+        return brand;
+    }
 
+    public String getModel ()
+    {
+        return model ;
+    }
+
+    public int getYear ()
+    {
+        return year;
+    }
+
+    public double getMileage ()
+    {
+        return mileage;
+    }
     // TODO: Implement addMileage(double km)
     // If km is negative → print error
     // Otherwise increase mileage
 
+    public void addMileage (double km)
+    {
+        if (km<0)
+            System.out.println("Error: km is negative");
+        else
+            mileage += km;
+    }
+
     // TODO: Declare abstract method getEnergyType()
 
+    public abstract String getEnergyType();
+
     public void basicInfo() {
         System.out.println(
                 year + " " + brand + " " + model +
diff --git a/src/main/java/org/util/VehicleInspector.java b/src/main/java/org/util/VehicleInspector.java
index c83c420..c481102 100644
--- a/src/main/java/org/util/VehicleInspector.java
+++ b/src/main/java/org/util/VehicleInspector.java
@@ -1,6 +1,9 @@
 package org.util;
 
 import org.*;
+import org.model.ElectricCar;
+import org.model.GasCar;
+import org.model.SportsCar;
 import org.model.Vehicle;
 
 /*
@@ -18,5 +21,11 @@ public class VehicleInspector {
         // If ElectricCar → print "Check battery system"
         // If SportsCar → print "Check brakes and performance"
         // If GasCar → print "Check engine and oil"
+        if (v instanceof ElectricCar)
+            System.out.println("Check battrey system");
+        else if(v instanceof SportsCar)
+            System.out.println("Check brakes and performance");
+        else if(v instanceof GasCar)
+            System.out.println("Check engine and oil");
     }
 }