The crane can be adjusted for any angle 0° ≤ θ ≤ 90° and any extension 0 ≤ x ≤ 5 m. For a...

The crane can be adjusted for any angle 0° ≤ θ ≤ 90° and any extension 0 ≤ x ≤ 5 m. For a suspended mass of 120 kg, determine the moment developed at A as a function of x and θ. What values of both x and θ develop the maximum possible moment at A? Compute this moment. Neglect the size of the pulley at B.