4. a) A disk of radius 12cm, initially at rest, begins rotating about its axis with a constant angular acceleration of 3.00rad/s2. After 5s, compute i. the angular velocity of the disk [2 marks] ii. the linear acceleration of the disk [ 2 marks] 111. the number of revolutions made by the disk in those 5 s? [2 marks] b) A disk of radius 25 cm rotating at 600 rev/min comes to a stop after making 350 rad. Compute i . the angular acceleration [2 marks] ii. the linear acceleration [2 marks] ill. time taken for the disk to come to a stop. [2 marks]