50 multiplied by 103 kg car starts from rest and accelerates uniformly to 18.5 m/s in 13. Assume that air resistance remains constant at 400 N during...

A 1.50 multiplied by 103 kg car starts from rest and accelerates uniformly to 18.5 m/s in 13.0 s. Assume that air resistance remains constant at 400 N during this time.(a) Find the average power developed by the engine.W(b) Find the instantaneous power output of the engine at t = 13.0 s, just before the car stops accelerating.W