A simply$-$supported beam is loaded as shown. The cross$-$section of this beam is also shown. moment for

this cross$-$section is I$=60590300$mm$^(4).$

$($a$)$ Draw and label the shear and momenand l

oading.$($b$)$ Determine the maximum tensile and compressive normal stresses that develop in this

beam for the given loading. Clearly indicate where these maximum stresses occur on the

cross$-$section and along the length of the beam. $[8$ marks$]$ A simply$-$supported beam is loaded as shown. The cross$-$section of this beam is also shown. Your assistant has determined that the centroid of the cross$-$section is located $119\mathrm{.}4$ mm up from the base as shown below, and she has also determined that the second area moment for this cross$-$section is I $=60590300$ mm$4.$

Then finally find the maximum flexural shear stress in the beam. Clearly identify where this maximum

shear stress occurs on the cross$-$section and along the beam length. $[6$ marks$]$