Two straight sections of freeway cross at a right angle. At the point of crossing, the east$-$west highway is at elevation $150$ ft and has a constant $+5\mathrm{.}0\%$ grade $($upgrade in the east direction$),$ and the north$-$south highway is at elevation $125$ ft and has a constant $-3\mathrm{.}0\%$ grade $($downgrade in the north direction$).$ Design a $90-$degree ramp that connects the northbound direction of travel to the eastbound direction of travel. Design the ramp for the highest design speed $($to nearest $5$ mi$/$h$)$ under urban setting with the constraint that the minimum allowable value of D is $8\mathrm{.}0.($Assume that the PC of the horizontal curve is at station $15+00,$ and the vertical curve PVIs are at the PC and PT$.)$ Give the stationing and elevations of the PC$,$ PT$,$ PVC$1$ & PVC$2,$ and PVT$1$ & PVT$2.$