$6$: A five$-$ lane with a $3\%$ normal crown slope roadway includes a circular curve. Each lane is $12$ ft wide, and the curve length is $800$ ft$,$ and the PC station is $90+00.$ The roadway is superelvated around the curve with the axis of rotation is at the centerline. The rate of superelevation is $8\%.$ The roadway profile is on a constant uphill grade of $0\mathrm{.}84\%.$ The elevation of the centerline at the PC is $80$ ft$.$ Assuming the $2/3$ and $1/3$ rule apply, determine:Length of superelevation runoff and tangent runout the station of beginning of tangent runout the station of beginning of superelavtion runoff the station of end of superelavtion runoffthe elevation at the center at the beginning of tangent runout