Problem $3(6$ points$)$ The concrete beam shown below is subjected to a uniform distributed superimposed dead $($D$)$ load of $0\mathrm{.}75\frac{k}{f}t,$ a point live $($L$)$ load of $2000$ lbs $,$ and its own self$-$weight $($unit$-$weight $=150pcf).$ Using the appropriate governing ACl $318-14/19$ load combination, plot the shear force $(V_u)$ and bending moment $(M_u)$ diagrams of the beam. The beam has a cross$-$section of $bh={12}^{\text{'}\text{'}}{24}^{\text{'}\text{'}}.$

$\frac{4}{7}$