two toy cars, car a and car b, run a 400m race. Car A accelerates at 4 m/s^2 for 5 seconds and then maintains a constant velocity throughout.

two toy cars, car a and car b, run a 400m race. Car A accelerates at 4 m/s^2 for 5 seconds and then maintains a constant velocity throughout. Car B accelerates at 3m/s^2 for 7 seconds and then maintains a constant velocity throughout. Who wins? Explain