a (a) What is the instantaneous angular acceleration, in radians per squared second, at time 17.5 s? (b) What is the change in angular velocity, in radians per second, during the time interval from 1.5 s to 9.25 s? (c) What is the change in angular velocity, in radians per second, during the time interval from 9.25 s to 17.5 s? (d) If the initial angular velocity is -3.1 rad/s, then what is the angular velocity, in radians per second, at time 23.75 s? (e) What is the average acceleration, in radians per squared second, during the time interval from 9.25 s to 24.75 s? rad/s A detailed graph of angular acceleration versus time is shown. a(rad/s) +5.0- -5.0 5.0 15.0 T 10.0 20.0 25.0 t(s)