The angular velocity of a process control motor is (13−12t2) rad/s, where t is in seconds. part a at what time does the motor reverse direction? express your answer to two significant figures and include the appropriate units. tt = nothing nothing request answer part b through what angle does the motor turn between t =0 s and the instant at which it reverses direction? express your answer to two significant figures and include the appropriate units. δθδ θ = nothing nothing request answer