$($a$)$ The following data are the average degree$-$day values $($F$/$day$)$ and the streamflow

$($ft$^(3)//$s$)$ in the South Fork of the Rio Grande at South Fork, Colorado, which drains

an area of $216$mi$^(2).$ Compute the daily values of the proportionality constant, K$,$ in

Equation $9\mathrm{.}6$ and the average for the $11-$day period. Compare the value with those

shown in Table $9\mathrm{.}4.$

equation for $9\mathrm{.}6$ is M $=$ KD