See the figure. A light string connects three blocks, two of which are being pulled across a frictionless horizontal tabletop as the third block is hanging from the massless pulley. Block A has a mass of MA = 2.50 kg, block B has a mass of my = 1.50 kg and block C has a mass of mc = 2.00 kg. Find: a) the tensions in the strings between the blocks, 7, and 72; and b) the acceleration a of the system. Be sure to include the free-body diagram for all of the considered objects. T, T A B C