The arm in the figure below weighs 43.7 N. The force of gravity acting on the arm acts through point A. Assume that L1 = 0.0760m, L2 = 0.267m and ? = 10.5 °. Determine the magnitude of the tension force Ft in the deltoid muscle. Determine the magnitude of the tension force Fs of the shoulder on the humerus (upper-arm bone) to hold the arm in the position shown. Determine the angle of tension force Fs relative to the x-axis.