PROBLEM $66$

The following two problems refer to the illustration shown.

$66\mathrm{.}1.$ What is the elevation of the point of compound vertical curvature, CVC$?$

$($A$)620\mathrm{.}96ft$

$($B$)621\mathrm{.}51ft$

$($C$)622\mathrm{.}98ft$

$($D$)625\mathrm{.}72ft$

$66\mathrm{.}2.$ Referring to the same asymmetrical vertical curve, what is the elevation of sta $20+60$ on the curve?

$($A$)620\mathrm{.}96ft$

$($B$)621\mathrm{.}51ft$

$($C$)622\mathrm{.}53ft$

$($D$)627\mathrm{.}56ft$