$-$ Design a triangular channel lined with rock riprap to carry a discharge of $25$ cfs$.$ Assume a bottom slope of S$\_\{0\}=0\mathrm{.}004$ and specific weight of water gamma $=62\mathrm{.}4$lbf $/$ f $*$ t $^3$ Find the required depth and top width $($in ft$)$ associated with the best hydraulically efficient cross$-$section. Confirm that the design passes the depth and shear stress checks.