A bicycle tire is spinning clockwise at 2.80 rad/s. During a time period At = 1.05 s, the tire is stopped and spun in the opposite (counterclockwise) direction, also at 2.80 rad/s. Calculate the change in the tire's angular velocity Aw and the tire's average angular acceleration day. (Indicate the direction with the signs of your answers. ) HINT (a) the change in the tire's angular velocity Aw (in rad/s) rad/s (b) the tire's average angular acceleration day (in rad/s2) rad/s2