Biomechanics problem. Have no idea

[448060061]

Shoulder abduction = 15°
Abduction acceleration = 50/rad/s/s
Abduction velocity = 20 rad/s
Radius of gyration and COM location from joint = 25cm
Mass of hand + Arm = 8 kg
Force of middle deltoid =400N
Middle deltoid only active muscle
Force of theraband = 70N
Middle deltoid insertion = 15°
Φ=90

The question is: solve for joint reaction force compression on the bone.
Also draw an appropriate free body diagram for this problem

 

[448060061]

Please help ! thanks

 

[haruspex]

You need to show some attempt. Start with a free body diagram.
Also, most readers on this forum won't know all these technical anatomy terms. An abstract force diagram will help us.