Use the Rational method to determine the $25-$yr peak flow from a paved shopping center parking lot that is $310$ ft by $1200$ ft$.$ The pavement is in average condition. The drainage path is overland flow on a paved surface for the $1200$ ft distance with a slope of $0\mathrm{.}015$ ft$/$ft$.$ Use figure $6\mathrm{.}5$ for rainfall IDF information. Use the shallow concentrated flow curves of figure $7\mathrm{.}6($Table $7\mathrm{.}2)$ to compute the time of concentration.