A uniform live load of 2 k/ft and a single concentrated live force of 6 k are placed on...

A uniform live load of 2 k/ft and a single concentrated live force of 6 k are placed on the floor beams. If the beams also support a uniform dead load of 350 lb/ft, determine (a) the maximum positive shear in panel CD of the girder and (b) the maximum negative moment in the girder at D. Assume the support at C is a roller and E is a pin.