$\backslash ((15\backslash$mathrm$\{$pts$\})\backslash )$ A trapezoidal stream channel with a bottom width of $60$ feet and $5$ horizontal to $1$ vertical bank slopes is flowing at a normal depth of $6$ feet. The slope of the stream section has been surveyed at $\backslash (0\mathrm{.}0032\backslash$mathrm$\{$ft$\}/\backslash$mathrm$\{$ft$\}\backslash ).$ A nearby gage on the stream recorded a discharge $\backslash ((\backslash$mathrm$\{$Q$\})\backslash )$ of $\backslash (3160\backslash$mathrm$\{$ft$\}3/\backslash$mathrm$\{$sec$\}\backslash )$ at the time the flow depth measurement was made. What is the composite Manning's n for the channel under these flow conditions? Would you expect this to vary if the flow was lower? What about higher? State your reasoning for both.