Let $\bar { y }$ Denote the Y-Coordinate of the Centroid of the Region Enclosed

Multiple Choice

Let $\bar { y }$ denote the y-coordinate of the centroid of the region enclosed by $x = 2 y - y ^ { 2 }$ and $y = 0$ Then $\bar { y }$ =

A) $\frac { 1,125 } { 8 }$
B) $\frac { 2 } { 5 }$
C) 1
D) $\frac { 3 } { 4 }$
E) $\frac { 45 } { 28 }$