Problem (6) The small crane is mounted along the side of a pickup bed and facilitates the handling of heavy loads. When the boom elevation angle is 0= 45, the force in the hydraulic cylinder BC is 4.5 kN, and this force applied at point C is in the direction from B to C (the cylinder is in compression). Determine the moment of this 4.5-kN force about the boom pivot point O. 785 340 mm mm 110 mm B 360 mm