Show me the steps to solve $11.$ A cantilever beam ABCD of the length $\backslash (3$ L $\backslash )$ is fixed to the end at D $.$ The beam is subject to a constant distributed load $\backslash ($ q$(\backslash$mathrm$\{$~N$\}/\backslash$mathrm$\{$m$\})\backslash )$ over the section AB $,$ and a moment $\backslash ($ M$\_\{0\}\backslash )$ of the magnitude $\backslash (4$ q L$^\{2\}(\backslash$mathrm$\{$~N$\}-\backslash$mathrm$\{$m$\})\backslash )$ at C$.$ The cross$-$section of the beam has a triangular shape, as shown below. The second area moment for a triangle is $\backslash ($ I$\_\{$z$\}=\backslash$frac$\{1\}\{36\}$ h$^\{4\}\backslash ).$

$($a$)$ Draw the shear force and bending moment diagrams. Mark the values in sections A$,$ B$,$ C $,$ and D $.$

$($b$)$ Determine the maximum compressive flexural stress $($largest magnitude$)$ and the maximum tensile flexural stress along the beam.

$($c$)$ Determine the stress state at point Q which is located on the cross$-$section B$.$ Sketch the stress state on the given stress element.