bonus concluded

src/main/java/org/model/Car.java

@@ -20,13 +20,22 @@ public abstract class Car extends Vehicle implements Serviceable {
 
         // TODO: Call super constructor
         this.seats = seats;
+        super(brand,model,year,mileage);
     }
 
     // TODO: Override getEnergyType() → return "Unknown"
-
+    @Override
+    public String getEnergyType() {return "Unknown";}
     // TODO: Override showDetails()
     // Print brand, model, year, mileage, and number of seats
-
+    @Override
+    public  void showDetails(){
+        System.out.println(
+                getYear()+ " " + getBrand() + " " + getModel() +
+                        " | Mileage: " + getMileage() +
+                        " | Seats: " + seats
+        );
+    }
     /*
      * Implement Serviceable methods:
      *
@@ -38,4 +47,12 @@ public abstract class Car extends Vehicle implements Serviceable {
      * performService():
      * - Print: "General car service completed"
      */
+
+    public boolean needsService(Vehicle v){
+        return v.getMileage()>10000;
+    }
+
+    public void performService(Vehicle v){
+        System.out.println("General car service completed");
+    }
 }