In Figure, two blocks, of mass m1 = 400 g and m2 = 600 g, are connected by a massless cord that is wrapped around a uniform disk of mass M = 500 g and radius R = 12.0 cm. The disk can rotate without friction about a fixed horizontal axis through its center; the cord cannot slip on the disk. The system is released from rest. Find

(a) The magnitude of the acceleration of the blocks,

(b) The tension T1 in the cord at the left, and

(c) The tension T2 in the cord at the right.