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