(4.5-4 The cantilever beam AB shown in the figure is subjected to a concentrated load P at the mid- point and a counterclockwise couple of moment M₁ = PL/4 at the free end. Draw the shear-force and bending-moment diagrams for this beam. A L 22 PROBLEM 4.5-4 PL M₁= 4 づ B 22 L