Physics Torque Problem Help !?

In the movie Terminator, Arnold Schwarzenegger lifts someone up by the neck and, with both arms fully extended and horizontal, holds the person off the ground. If the person being held weighs 705 N, is 59.2 cm from the shoulder joint, and Arnold has an anatomy ogous to that in the figure below (x1 = 12.2 cm, x2 = 28.5 cm, and α = 13.0°), what force must each of the deltoid muscles exert to perform this task? ume the weight of the arm to be 28.9 N.