Solve the Problem $y = 4 \cos x$ And The $x - a x i s$

Multiple Choice

Solve the problem.
-Find the volume of the solid generated by revolving the region bounded by the curve $y = 4 \cos x$ and the $x - a x i s$ , $\frac { \pi } { 2 } \leq x \leq \frac { 3 \pi } { 2 }$ , about the $x$ -axis.

A) $8 \pi ^ { 2 }$
B) $16 \pi$
C) $16 \pi ^ { 2 }$
D) $8 \pi ^ { 3 }$