A column with a wide$-$flange section has a flange width $b=400mm,$ height $h=400mm,$ web thickness $t_w=13mm,$ and flange thickness $t_f=21mm($Figure $1).$ Calculate the stresses at a point $75$ mm above the neutral axis if the section supports a tensile normal force $N=2\mathrm{.}1kN$ at the centroid, shear force $V=5kN,$ and bending moment $M=3\mathrm{.}1kN*m$ as shown $($Eigure $2).$

Part A $-$ Normal stress

Calculate the normal stress at the point due to the internal normal force on the section.

Express your answer with appropriate units to three significant figures.

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Part B $-$ Shear stress

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.

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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.

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