Find the Center of Mass of a Thin Plate of Constant

Multiple Choice

Find the center of mass of a thin plate of constant density covering the given region.
-The region bounded by $y = 8 - x$ and the axes

A) $\bar { x } = \frac { 8 } { 3 } , \bar { y } = \frac { 8 } { 3 }$
B) $\bar { x } = 8 , \bar { y } = 8$
C) $\bar { x } = 32 , \bar { y } = 32$
D) $\bar { x } = \frac { 256 } { 3 } , \bar { y } = \frac { 256 } { 3 }$