Find the Volume of the Solid Generated by Revolving the Shaded

Multiple Choice

Find the volume of the solid generated by revolving the shaded region about the given axis.
-About the y-axis


$x = 2 \tan \left( \frac { y } { 7 } \right)$

A) $7 \pi ^ { 2 } - 14 \pi$
B) $28 \pi$
C) $14 \pi ^ { 2 } + 7 \pi$
D) $14 \pi ^ { 2 } - 28 \pi$