rotational mechanics

Two discs of masses M and M/4 having radii R andR/2 resp. are kept on a smooth horiontal surface. The larger disc has a freely moving axle pivoted through its centre. the smaller disc having light thread wrapped over it is attached to the axle of larger disc, as shown in figure. A hrizontal force F is applied from the top most point of larger disc.
(a) fimd linear and angular accelerationa of the two discs.
(b) During the time the larger disc makes one full revolution what will be no. of revolutions made by the smaller disc?

pls give a detailed solution for this with the final answer.