A column with a wide$-$flange section has a flange width bb $=175$ mmmm$,$ height hh $=175$ mmmm$,$ web thickness twtw $=7\mathrm{.}5$ mmmm$,$ and flange thickness tftf $=11$ mmmm $($Figure $1).$ Calculate the stresses at a point $65$ mmmm above the neutral axis if the section supports a tensile normal force NN $=3$ kNkN at the centroid, shear force VV $=8$ kNkN$,$ and bending moment MM $=3\mathrm{.}8$ kN$$mkN$$m as shown $($Figure $2).$

Part B $-$ Shear stress

Figure

Calculate the magnitude of the shear stress at the point due to the internal shear on the section.

Express your answer with appropriate units to three significant figures.

Part C $-$ Combined normal stress

Calculate the combined normal stress at the point due to internal normal force and the internal bending moment on the section.

Express your answer with appropriate units to three significant figures.