docs: update README.md

README.md

@@ -65,19 +65,23 @@ Your task is to complete the implementation of the classes by finding the `TODO`
 - Complete the constructor using `super`
 - Override the `getEnergyType()`
 - Override the `showDetails()`
+- Implement `needsService(Vehicle v)` and `performService()` from the Serviceable interface
 
 ### 3. GasCar Class
 - Override `getEnergyType()`
 - Implement `refuel(double amount)` with validation
 - Override `showDetails()`
+- Override `Serviceable.java` methods
 
 ### 4. ElectricCar Class
 - Override `getEnergyType()`
 - Implement `charge(double amount)` with validation
 - Override `showDetails()`
+- Override `Serviceable.java` methods
 
 ### 5. SportsCar Class
 - Override `showDetails` to include specific Sports Car feature alongside the base class details
+- Override `Serviceable.java` methods
 
 ### 6. VehicleInspector Class
 - Complete the `inspect(Vehicle v)` method using `instanceof`