$1)$ a$.$Draw the axial force, torque, shear force and bending moment diagrams. Note that the bending occurs in two planes, XY and XZ$,$ hence, you will have two shear force and bending diagrams.

b$.$ Locate the most critical section. You must give reason $($with numerical backing$)$ for your choice.

c$.$ Calculate all the stresses at the four points $($top$,$ bottom, right left$)$ and at the point with maximum bending stress

Fb$=34\mathrm{.}934$Kn