For the beam and cross section shown below, determine the maximum transverse shear stress anywhere along the length of the beam at a location $3$ inches from the top of the section. Also, determine the maximum compressive bending stress in the cross section anywhere along the length of the beam. The y centroid is located $13$ inches measured from the bottom of the cross section, and $\backslash (\backslash$mathrm$\{$I$\}\_\{\backslash$mathrm$\{$x$\}\}\backslash )$ is $\backslash (17,838\backslash$mathrm$\{$in$\}^\{4\}\backslash ).$ The reaction at the pin support is $15\mathrm{.}67$ kips upwards, and the reaction at the roller support if $54\mathrm{.}3$ kips upwards.