2) The following functions A(t) and B(t) represent the distance traveled, in meters, versus the time t, in .seconds, of two race cars: Car A: A(t) = - t(t + 3)2 Car B: B(1) = (0.51)" a) Which car is faster between time t = Is and t = 4s? b) Which car is faster at time equals to exactly 4s