3. (25 points) A model of the static equilibrium of a horizontal arm that holds a weight by means of the deltoid muscle is depicted in the below figure. Solve for

M, R, and 3. Now evaluate the r and y components of the muscle force, the magnitudes of the joint reaction force, and its angle for the following parameters: a = 15 cm, b = 30 cm, c = 60 cm, 0 = 15°, W = 40 N, and W₁ = 60 N. M W M, W₂ W₂