In the figure, a 1.95 kg ball is connected by means of two massless strings, each of length L = 1.53 m, to a vertical, rotating rod. The strings are tied to the rod with separation d = 1.53 m and are taut. The tension in the upper string is 53.0 N. What are (a) the tension in the lower string, (b) the magnitude of the net force F_net on the ball, and (c) the speed of the ball?