A 1200 kg, 17 m long crane boom is holding up a 3000 kg at its far end. The boom pivots at point A, and is attached to a support cable at point B. The support cable makes an angle of 10∘ with the boom, and the boom makes an angle of 30∘ with the horizontal.

a) Determine the magnitude of tension in the support cable, in N.
b) Determine the magnitude of force at the pivot point, in N.
c) Determine the angle of the force at the pivot point above the horizontal, in ∘