A rectangular concrete $\backslash (($n$=0\mathrm{.}015)\backslash )$ open channel with base width of $20$ feet is proposed with a new flood control project. Assuming that the design flow rate is fixed at $185$ cfs :

$1.$ Plot the elevation head for the channel $($Elevation head, $\backslash (\backslash$mathrm$\{$EP$\}=\backslash$mathrm$\{$y$\}\backslash ))$

$2.$ Plot the velocity head for the channel $($Velocity head, $\backslash (\backslash$mathrm$\{$EK$\}=\backslash$mathrm$\{$V$\}2/2\backslash$mathrm$\{$~g$\}=\backslash$mathrm$\{$Q$\}2/2\backslash$mathrm$\{$gA$\}2\backslash ))$

$3.$ Plot the specific energy curve for the channel $($specific energy $\backslash (=$E P$+$E K $\backslash ))$

$4.$ Calculate the critical depth for this channel and compare with the graph you create.

Complete parts $1$ to $3$ in scratch paper and enter the critical depth in the box below. $($don$\text{'}$t include units$)$

Please round to the tenths place $(1$ decimal place$).$