diff --git a/src/main/java/org/Main.java b/src/main/java/org/Main.java
index 7a3d8c8..2fffb84 100644
--- a/src/main/java/org/Main.java
+++ b/src/main/java/org/Main.java
@@ -1,126 +1,78 @@
 package org;
 
+import org.behavior.Serviceable;
+import org.model.ElectricCar;
+import org.model.GasCar;
+import org.model.SportsCar;
+import org.model.Vehicle;
+import org.util.VehicleInspector;
+
 public class Main {
-    public static void main(String[] args) {
+    public static void main(String[] args)
+    {
+        // Stage 1
 
-        // ============================================================
-        // TODO 1:
-        // Create one instance of each vehicle type:
-        //    - ElectricCar
-        //    - GasCar
-        //    - SportsCar
-        //
-        // Requirements:
-        //   • Use the constructors you created in each class.
-        //   • Provide realistic values (brand, model, year, mileage, etc.).
-        //   • Store them in variables such as:
-        //          ElectricCar tesla = new ElectricCar(...);
-        // ============================================================
-
-
-
-
-
-        // ============================================================
-        // TODO 2:
-        // Create an array of Vehicle:
-        //       Vehicle[] vehicles = { ... };
-        //
-        // This array MUST contain the objects created above.
-        // This demonstrates **polymorphism** because all different
-        // subclasses (ElectricCar, GasCar, SportsCar) are stored
-        // as their parent type (Vehicle).
-        // ============================================================
-
-
-
-
-
-        // ============================================================
-        // TODO 3:
-        // Loop through the Vehicle[] array and:
-        //   • Call v.basicInfo();
-        //   • Print a blank line after each.
-        //
-        // Purpose:
-        //   Demonstrate that all subclasses share the same Vehicle
-        //   behavior and can call inherited methods.
-        // ============================================================
-
-
-
-
-
-        // ============================================================
-        // TODO 4:
-        // Use VehicleInspector to inspect each vehicle:
-        //
-        //     VehicleInspector.inspect(v);
-        //
-        // Purpose:
-        //   • Demonstrate the use of `instanceof`
-        //   • Show subclass‑specific inspection messages
-        // ============================================================
-
-
-
-
-
-        // ============================================================
-        // TODO 5:
-        // Create an array of Serviceable:
-        //       Serviceable[] serviceables = { ... };
-        //
-        // This demonstrates **interface‑based polymorphism**.
-        // Every Car subtype implements Serviceable.
-        //
-        // IMPORTANT:
-        //   • You must cast to Vehicle when needed:
-        //           Vehicle v = (Vehicle) s;
-        //
-        // ============================================================
-
-
-
-
-
-        // ============================================================
-        // TODO 6:
-        // Loop through the Serviceable[] array:
-        //
-        // Steps inside loop:
-        //
-        //   1. Cast the current object to Vehicle:
-        //          Vehicle v = (Vehicle) s;
-        //
-        //   2. Check:
-        //          if (s.needsService(v)) { ... }
-        //
-        //   3. If true:
-        //          - Print a message showing brand + model
-        //          - Call s.performService();
-        //
-        //   4. Otherwise:
-        //          - Print that the car does not need service
-        //
-        // Add blank lines between each item for readability.
-        // ============================================================
-
-
-
-
-
-        // ============================================================
-        // TODO 7 (Optional):
-        // After everything is done, print a final message:
-        //
-        //   System.out.println("=== Workshop Completed ===");
-        //
-        // ============================================================
+        ElectricCar tesla = new ElectricCar("Tesla", "Model 3", 2023, 5000, 5, 75, 90.5);
+        GasCar toyota = new GasCar("Toyota", "Camry", 2022, 15000, 5, 70, "Gasoline");
+        SportsCar porsche = new SportsCar("Porsche", "911", 2023, 7000, 2, 50, "Premium Gasoline", 3.2);
+
+        System.out.println("--- Vehicle Instances Created ---");
+        System.out.println();
+
+        // Stage 2
+
+        Vehicle[] vehicles = {tesla, toyota, porsche};
+        System.out.println("--- Vehicle Array Created ---");
+        System.out.println();
+
+        // Stage 3
+
+        System.out.println("--- Displaying Basic Vehicle Info ---");
+        for (Vehicle v : vehicles)
+        {
+            v.basicInfo();
+            System.out.println();
+        }
+        System.out.println();
+
+        // Stage 4
+
+        System.out.println("--- Inspecting Vehicles ---");
+        for (Vehicle v : vehicles)
+        {
+            VehicleInspector.inspect(v);
+            System.out.println(); // Blank line for readability
+        }
+        System.out.println();
 
 
+        // Stage 5
+
+        Serviceable[] serviceables = {tesla, toyota, porsche};
+        System.out.println("--- Serviceable Array Created ---");
+        System.out.println();
+
+        // Stage 6
+
+        System.out.println("--- Performing Service Checks ---");
+        for (Serviceable s : serviceables)
+        {
+            Vehicle v = (Vehicle) s;
+
+            if (s.needsService(v))
+            {
+                System.out.println(v.getBrand() + " " + v.getModel() + " needs service.");
+                s.performService();
+            }
+            else
+                System.out.println(v.getBrand() + " " + v.getModel() + " does not need service.");
+
+            System.out.println(); // Blank line for readability
+        }
 
 
+        // Stage 7
 
+        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..3713e73 100644
--- a/src/main/java/org/model/Car.java
+++ b/src/main/java/org/model/Car.java
@@ -18,23 +18,32 @@ public abstract class Car extends Vehicle implements Serviceable {
     public Car(String brand, String model, int year,
                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 showDetails()
+    @Override
+    public void showDetails()
+    {
+        System.out.println("Seats: " + seats);
+    }
 
-    /*
-     * Implement Serviceable methods:
-     *
-     * needsService(Vehicle v):
-     * - Check the mileage of the current car
-     * - If mileage > 10000 return true
-     * - Otherwise return false
-     *
-     * performService():
-     * - Print: "General car service completed"
-     */
+    @Override
+    public boolean needsService(Vehicle v)
+    {
+        return v.getMileage() > 10000;
+    }
+
+    @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..3c6671a 100644
--- a/src/main/java/org/model/ElectricCar.java
+++ b/src/main/java/org/model/ElectricCar.java
@@ -27,11 +27,49 @@ public class ElectricCar extends Car implements Chargeable {
         this.chargeLevel = chargeLevel;
     }
 
-    // TODO: Override getEnergyType() → return "Electric"
+    @Override
+    public String getEnergyType()
+    {
+        return "Electric";
+    }
 
-    // TODO: Override showDetails()
 
-    // TODO: Implement charge(double amount)
-    // Validate negative
-    // Cap at 100
+    @Override
+    public void showDetails()
+    {
+        super.showDetails();
+        System.out.println("Battery Capacity: " + batteryCapacity + " kWh");
+        System.out.println("Charge Level: " + chargeLevel + "%");
+    }
+
+
+    @Override
+    public void charge(double amount)
+    {
+        if (amount < 0)
+            System.out.println("Error: Cannot charge with a negative amount.");
+        else
+        {
+            this.chargeLevel += amount;
+
+            if (this.chargeLevel > 100)
+                this.chargeLevel = 100;
+
+            System.out.println("Charged. Current charge level: " + this.chargeLevel + "%");
+        }
+    }
+
+    @Override
+    public boolean needsService(Vehicle v)
+    {
+        return v.getMileage() > 8000;
+    }
+
+    @Override
+    public void performService()
+    {
+        System.out.println("Battery system checked");
+        this.chargeLevel = 100; // Reset charge level
+        System.out.println("Charge level reset to 100%");
+    }
 }
diff --git a/src/main/java/org/model/GasCar.java b/src/main/java/org/model/GasCar.java
index 58b3e45..de6fe27 100644
--- a/src/main/java/org/model/GasCar.java
+++ b/src/main/java/org/model/GasCar.java
@@ -27,11 +27,47 @@ public class GasCar extends Car implements Refuelable {
         this.fuelType = fuelType;
     }
 
-    // TODO: Override getEnergyType() → return fuelType + " (Gas)"
+    @Override
+    public String getEnergyType()
+    {
+        return fuelType + " (Gas)";
+    }
 
-    // TODO: Implement refuel(double amount)
-    // Validate amount
-    // Cap at 100
+    @Override
+    public void refuel(double amount)
+    {
+        if (amount < 0)
+            System.out.println("Error: Cannot refuel with a negative amount.");
+        else
+        {
+            this.fuelLevel += amount;
 
-    // TODO: Override showDetails()
+            if (this.fuelLevel > 100)
+                this.fuelLevel = 100;
+
+            System.out.println("Refueled. Current fuel level: " + this.fuelLevel + "%");
+        }
+    }
+
+    @Override
+    public void showDetails()
+    {
+        super.showDetails();
+        System.out.println("Fuel Type: " + fuelType);
+        System.out.println("Fuel Level: " + fuelLevel + "%");
+    }
+
+    @Override
+    public boolean needsService(Vehicle v)
+    {
+        return v.getMileage() > 12000;
+    }
+
+    @Override
+    public void performService()
+    {
+        System.out.println("Engine oil changed");
+        this.fuelLevel = 100;
+        System.out.println("Fuel level reset to 100%");
+    }
 }
diff --git a/src/main/java/org/model/SportsCar.java b/src/main/java/org/model/SportsCar.java
index 2f8e459..a276371 100644
--- a/src/main/java/org/model/SportsCar.java
+++ b/src/main/java/org/model/SportsCar.java
@@ -24,8 +24,22 @@ public class SportsCar extends GasCar {
         this.zeroToHundred = zeroToHundred;
     }
 
-    // TODO: Override showDetails()
-    // Print header
-    // Call super.showDetails()
-    // Print acceleration time
+    @Override
+    public void showDetails()
+    {
+        super.showDetails();
+        System.out.println("0-100 km/h Acceleration: " + zeroToHundred + "s");
+    }
+
+    @Override
+    public boolean needsService(Vehicle v)
+    {
+        return v.getMileage() > 5000;
+    }
+
+    @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..22963cb 100644
--- a/src/main/java/org/model/Vehicle.java
+++ b/src/main/java/org/model/Vehicle.java
@@ -20,15 +20,27 @@ public abstract class Vehicle {
         this.mileage = mileage;
     }
 
-    // TODO: Create getters for all fields
+    public String getBrand() {return brand;}
 
-    // TODO: Implement addMileage(double km)
-    // If km is negative → print error
-    // Otherwise increase mileage
+    public String getModel() {return model;}
 
-    // TODO: Declare abstract method getEnergyType()
+    public int getYear() {return year;}
 
-    public void basicInfo() {
+    public double getMileage() {return mileage;}
+
+    public void addMileage(double km)
+    {
+        if (km < 0)
+            System.out.println("Error: Mileage cannot be negative.");
+        else
+            this.mileage += km;
+    }
+
+
+    public abstract String getEnergyType();
+
+    public void basicInfo()
+    {
         System.out.println(
                 year + " " + brand + " " + model +
                         " | Mileage: " + mileage +
diff --git a/src/main/java/org/util/VehicleInspector.java b/src/main/java/org/util/VehicleInspector.java
index c83c420..5c78d8e 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;
 
 /*
@@ -10,13 +13,16 @@ import org.model.Vehicle;
 
 public class VehicleInspector {
 
-    public static void inspect(Vehicle v) {
-
+    public static void inspect(Vehicle v)
+    {
         v.basicInfo();
 
-        // TODO:
-        // If ElectricCar → print "Check battery system"
-        // If SportsCar → print "Check brakes and performance"
-        // If GasCar → print "Check engine and oil"
+        switch (v)
+        {
+            case ElectricCar electricCar -> System.out.println("Check battery system");
+            case SportsCar sportsCar -> System.out.println("Check brakes and performance");
+            case GasCar gasCar -> System.out.println("Check engine and oil");
+            default -> {}
+        }
     }
 }