Consider the below data for a vertical curve and answer questions $4-7.$

$L=450ft$

$PVC$ station $=19+00$

PVI station $=21+25$

YPVI $=82\mathrm{.}79ft$

$g1=-5\%$

$g2=+3\%$

What is the horizontal distance to the minimum elevation on the curve in feet?

a$)168\mathrm{.}75$

b$)1125\mathrm{.}00$

c$)281\mathrm{.}25$

d$)675\mathrm{.}00$

e$)140\mathrm{.}63$

What is the rate of change of grade?

a$)0\mathrm{.}0017$

b$)0\mathrm{.}17$

c$)0\mathrm{.}00017$

d$)0\mathrm{.}00175$

e$)0\mathrm{.}017$

What is curve elevation at station $22+50?$

a$)87\mathrm{.}04$

b$)87\mathrm{.}10$

c$)88\mathrm{.}26$

d$)87\mathrm{.}43$

f$)87\mathrm{.}60$

What is the absolute difference of elevation between station $22+50$ and station PVC$?$

a$)6\mathrm{.}61$

b$)7\mathrm{.}00$

c$)6\mathrm{.}94$

d$)5\mathrm{.}78$

e$)6\mathrm{.}44$