$(20$ points$)$ Determine the peak hourly flow in million gallons per day $($mgd$)$ for an $800-$acre urban area with the following characteristics: domestic flow of $90$ gallons per capita per day $($gped$),$ commercial flow of $15$ gpcd$,$ infiltration rate of $600$ gallons per day per acre $($gpd$/$acre$),$ and a population density of $20$ persons per acre.

$(20$ points$)$