$14\mathrm{.}3$ A trapezoidal channel with a side slope of $1($vertical$)$:$2($horizontal$)$ and a bottom width of

$10ft$ carries a discharge of $300cfs.($a$)$ Plot the specific energy curve for the channel. $($b$)$ At

what depth will the critical flow occur? $($c$)$ Determine the alternate depth to a $4\mathrm{.}0-$ft depth

of flow. $($d$)$ What is the state of flow at the alternate depth?