Using the rational method, determine the cubic feet per second $($cfs$)$ difference in peak flow for the $10-$year storm event between pre and post development of a $10-$acre square site, shown below. The pre$-$developed condition is a rural cultivated field. The developed condition is a business neighborhood area with a developed time of concentration of $5-$min. You may assume shallow concentrated flow.

PDS$-$based precipitation frequency estimates with $90\%$ confidence intervals $($in inches$/$hour$){?}^1$