A $-2\mathrm{.}5\%$ grade meets a $+2\mathrm{.}50\%$ grade at station $4+200$ and elevation $148\mathrm{.}657m,180-m$

curve, stakeout at $30-m$ increments.

List station elevations, including $BVC$ and EVC, for an equal$-$tangent parabolic curve for the data given. Give the elevations in order of increasing $x.$

Express your answers in meters to six significant figures separated by commas.

Elev $=148\mathrm{.}657,150\mathrm{.}843,155\mathrm{.}157,157\mathrm{.}657,162\mathrm{.}407,166\mathrm{.}657m$

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PLEASE HELP I DONT UNDERSTAND WHAT IM DOING WRONG OR GETTING LOST ON THIS QUESTION!