Given the data below, estimate the sewer flows $($Q$1,$ Q$2,$ and Q$3)$ then use the

below layout and contour lines to design the different sections of sanitary sewer to carry these

flows at a minimum velocity of $0\mathrm{.}60$ m$/$s $($n $=0\mathrm{.}013).$ using both manual calculations and EPA

SWMM software. Assume that the minimum depth of the sewer below the street level is $1\mathrm{.}50$ m