Problem $3$: Determine Vumax and Mumax for an interior girder of the given bridge shown by drawing the V

and $M$ diagrams. Then, use the appropriate distribution factors $($DFs$)$ and Impact Load $($I$)$ to compute the

design $V$ and $M$ to be used for the bridge. Assume HS$20-44$ truck and that the bridge is a highway bridge with

$4$ lanes. Assume that the $2-$kip force is directly at the support, but has no bearing on the calculations of the

distribution factors $($DFs$).$