4-3. The boom DF of the jib crane and the column DE have a uniform weight of 50 lb/ft. If the hoist and load weigh 300 lb, determine the internal normal force, shear force, and bending moment in the crane at points A, B, and C. 5'ft 7'ft D E F -2 -8 ft- -3 ft- Prob. 4-3 300 lb