A train has a length of 92 m and starts from rest with a constant acceleration at a time t = 0 s. At this instant, the car reaches the end of the train. The car is moving with a constant velocity. At a time t = 14 s, the car just reaches the front of the train. Ultimately, however, the train pulls ahead of the car, and at time t= 28 s, the car is again at the rear end of the train. Find the magnitudes of a) the car's velocity and b) the train's acceleration.