Find an Equation for the Ellipse Described $( 6,4 )$ ; Focus At

Multiple Choice

Find an equation for the ellipse described.
-Center at $( 6,4 )$ ; focus at $( 10,4 )$ ; vertex at $( 12,4 )$

A) $\frac { ( x + 6 ) ^ { 2 } } { 36 } + \frac { ( y + 4 ) ^ { 2 } } { 20 } = 1$
B) $\frac { ( x - 6 ) ^ { 2 } } { 81 } + \frac { ( y + 4 ) ^ { 2 } } { 8 } = 2$
C) $\frac { ( x + 6 ) ^ { 2 } } { 16 } - \frac { ( y - 4 ) ^ { 2 } } { 16 } = 1$
D) $\frac { ( x - 6 ) ^ { 2 } } { 36 } + \frac { ( y - 4 ) ^ { 2 } } { 20 } = 1$