static void Main(string[] args) { Car car = new Car("BMW", 5, "V8", 20); car.Display(); MotorBike bike = new MotorBike("Honda", 3, "1000", 10); bike.Display(); Rentalable rentableVehicle = new Rentalable(car); rentableVehicle.RentItem("Johnny"); rentableVehicle.RentItem("Mary"); rentableVehicle.Display(); }