Find the Standard-Form Equation of the Ellipse Centered at the Origin

Multiple Choice

Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.
-An ellipse with vertices $( \pm 6,0 )$ and foci at $( \pm 5,0 )$

A) $\frac { x ^ { 2 } } { 11 } + \frac { y ^ { 2 } } { 36 } = 1$
B) $\frac { x ^ { 2 } } { 11 } + \frac { y ^ { 2 } } { 61 } = 1$
C) $\frac { x ^ { 2 } } { 11 } + \frac { y ^ { 2 } } { 11 } = 1$
D) $\frac { x ^ { 2 } } { 36 } + \frac { y ^ { 2 } } { 11 } = 1$