(a) If the combination is released with the stick horizontal, what is the speed (in m/s) of the center of the disk when the stick is vertical? m/s (b) What is the acceleration (in m/s2) of the center of the disk at the instant the stick is released? (Enter the magnitude.) m/s2 (c) What is the acceleration (in m/s2) of the center of the disk at the instant the stick passes through the vertical? (Enter the magnitude.) m/s2