need help for physics honework

Force, Linear Kinematics and Kinetics Homework 4. A weight lifter is lifting a ball that weighs 10,0 [by (4.5 kg). The biceps muscle everts a force FM upward on the forearm at a point cm from the elbow joint, as shown in the picture below. I kepi a. Drama a fee body diagram of the system [2 pts] O b, Assume that the arm is not moving and forces are balanced, The weight of the forearm is approximately 7 kg at its center of gravity. The biceps exert a force at a 75 degree aryla from the horizontal. Find the force of the bleeps needed to keep the arm in position. (4 pu)