$(30\%)$

For the given symmetric I$-$beam and applied vertical shear force of $28$ kips,

determine maximum shear stress $()$ in the beam. Also, determine the shear

stress at a$)$ the top of the cross section, b$)$ the bottom of the cross sections, c$)$

the bottom of the flange, and d$)$ the top of the web. The Moment of Inertia of

the cross section is $245i{n}^4$ and the centroid is at mid$-$height.