The drawing shows two boxes resting on frictionless ramps. One boxis relatively light and sits on a steep ramp. The other box isheavier and rests on a ramp that is less steep. The boxes arereleased from rest at A and allowed to slide down the ramps. Thetwo boxes have masses of 9 and 42 kg. If A and Bare 3.5 and 0.5 m, respectively, above theground, determine the speed of (a) thelighter box and (b) the heavier box wheneach reaches B. (c) What is the ratio ofthe kinetic energy of the heavier box to that of the lighter box atB?