The system consists of two smooth spheres, each weighing 1.5 kg and connected by a light spring. The two bars are of negligible weight, hinge freely at their ends, hang in the vertical plane, and each bar is 0.3 m long. The spheres are confined to slide in the smooth horizontal guide. If a horizontal force F = 45 N is applied to one bar at the position shown where b = 0.12 m, (a) what is the acceleration of the center C of the spring, and (b) what are the normal forces on the two spheres exerted by the guide at the instant shown (the distance between the two spheres is 0.3 m)?