Tabulate station elevations $($stakeout at full stations$)$ for an equal$-$tangent parabolic curve with a $455-ft$ curve, grades of $g1=+2\mathrm{.}00\%$ and $g2=-1\mathrm{.}50\%,$ VPI at station $78+60,$ and elevation $7855\mathrm{.}35ft.$ Check the table by second differences. At the end find the maximum elevation of the curve and its station.