public ArrayList<Car> findCarsById(int id) {
        ArrayList<Car> carList = new ArrayList<Car>();

        for (int i = 0; i < 4; i++) {
            for (int j = 0; j < Cars.get(i).size(); j++) {
                if (Cars.get(i).get(j).getId() == id)
                    carList.add(Cars.get(i).get(j));
            }

        }

        return carList;
    }