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

When the hand is holding the 5-lb stone, the humerus H , assumed to be smooth, exerts normal forces F_C and F_A on the radius C and ulna A , respectively, as shown. If the smallest cross-sectional area of the ligament at B is 0.30 in ² , determine the greatest average tensile stress to which it is subjected.