The runoff volume from a $3\mathrm{.}5-$in$.$ rainfall on a $32-$acre watershed was $4\mathrm{.}8$ acre$-$ft$.$ If $0\mathrm{.}3$ in $.$ of rainfall occurred before

the start of runoff, estimate the potential maximum retention. For this case, how accurate is the empirical relationship

of Equation $5\mathrm{.}41?$ Based on the empirical relationship of Equation $5\mathrm{.}41,$ what is the storm$-$event curve number?