Starting from rest, a disk rotates about its central axis with constant angular acceleration. in 5.0 s, it rotates 25 rad. during that time, what are the magnitudes of:
(a) the angular acceleration,
(b) what is the instantaneous angular velocity of the disk at the end of the 5.0 s?
(c) the average angular velocity for first 5 s?
(d) with the angular acceleration unchanged, through what additional angle will the disk turn during the next 5.0 s?