Question $2$: $(50$ p$)$ A wastewater system will be laid along the street given in the figure. The flow rates entering the system are given in the figure: Project$-$related limitations hmin $2$ m$,$ Minimum and maximum allowable speeds in the system are $0\mathrm{.}5$ m$/$s and $4$ m$/$s$.$ Manning roughness constant is N $=0\mathrm{.}016.$ Jmin$=0\mathrm{.}0015$ for all channels in the system. For AB and BC routes, find the required slopes, appropriate pipe diameters, check the flow rates, commercial pipes are available in $25$ mm increments.

$2/30$Gell ms$2112,$J$12$lo$8$ m