A block of mass m1 = 6.91 kg on a frictionless plane inclined at angle ? = 25.2° is connected by a cord over a massless, frictionless pulley to a second block of mass m2 = 2.03 kg hanging vertically (Fig. 5-52). (a) What is the acceleration of the hanging block (choose the positive direction up)? (b) What is the tension in the cord?