When holding the 5-lb stone in equilibrium, the humerus H, assumed to be smooth, exerts no...

When holding the 5-lb stone in equilibrium, the humerus H, assumed to be smooth, exerts normal forces FC and FA, on the radius C and ulna A as shown. Determine these forces and the force FB that the biceps B exerts on the radius for equilibrium. The stone has a center of mass at G. Neglect the weight of the arm.