The beam in Figure 2 is pinned at A, rests on a roller at B and overhangs to C. It carries a uniformly distributed load of 12 kN/m over AB and a point load of 20 kN at C. Determine (a) the reaction at B (in kN), (b) the maximum sagging (positive) bending moment (in kN·m) and (c) the distance of the point of contraflexure from A (in m). Sketch the SFD and BMD in your rough work.