The grade line is being developed for a six$-$lane freeway with a design speed of $70$ mph$.$ A rising $2\mathrm{.}0\%$ grade meets a falling grade of $1\mathrm{.}5\%$ at station $100+00.$ The elevation of the P$.$I. of the two grades is $98\mathrm{.}00$ ft$.$a$.$ Using vertical curve length of $1400$ ft$,$ compute the middle ordinate of the vertical curve.b$.$ For each station $,($i$.$e$.,93+00,94+00,$ etc$),$ calculate VC elevation.