$7\mathrm{.}3[8$ points$]$ Develop a performance curve for a $6\mathrm{.}00ft$ wide by $4\mathrm{.}00ft$ high concrete box culvert wingwall flares, $n=0\mathrm{.}013).$ Use flow rates of $100cfs,250cfs,$ and $310cfs$ to develop the curve. Assume outlet control for all flows and neglect tailwater elevations. Other data are as follows:

$\backslash$table$[[$Culvert length,$L_c,150\mathrm{.}0ft$