At t=0 a grinding wheel has an angular velocity of 25.0 rad/s. It has a constant angular acceleration of 31.0 rad/s2 until a circuit breaker trips at time t = 1.80 s. From then on, it turns through an angle 432 rad as it coasts to a stop at constant angular acceleration.(a) Through what total angle did the wheel turn between t = 0 and the time it stopped? (b) At what time did it stop? (c) What was its acceleration as it slowed down?