Solve the Problem $\mathrm { P } ( \mathrm { x } , \mathrm { y } )$

Multiple Choice

Solve the problem.
-Find the average distance from a point $\mathrm { P } ( \mathrm { x } , \mathrm { y } )$ in the annular region $4 \leq \mathrm { x } ^ { 2 } + \mathrm { y } ^ { 2 } \leq 16$ to the origin.

A) $\frac { 44 } { 9 }$
B) $\frac { 28 } { 9 }$
C) $\frac { 11 } { 2 }$
D) $\frac { 7 } { 2 }$