A horizontal curve is being designed through mountainous terrain for a four$-$lane road with lanes that are $10$ ft wide. The central angle $(\backslash$Delta $)$ is known to be $40$ degrees, the tangent distance is $520$ ft$,$ and the stationing of the tangent intersection $($PI$)$ is $2600+00.$ Under specified conditions and vehicle speed, the roadway surface is determined to have a coefficient of side friction of $0\mathrm{.}08,$ and the curve$$s superelevation is $0\mathrm{.}09$ ft$/$ft$.$ What is the stationing of the PC and PT and what is the safe vehicle speed?