Find an Equation for the Ellipse Described $( 0 , - 4 )$

Multiple Choice

Find an equation for the ellipse described.
-Focus at $( 0 , - 4 )$ ; vertices at $( 0 , \pm 8 )$

A) $\frac { x ^ { 2 } } { 16 } + \frac { y ^ { 2 } } { 48 } = 1$
B) $\frac { x ^ { 2 } } { 64 } + \frac { y ^ { 2 } } { 48 } = 1$
C) $\frac { x ^ { 2 } } { 16 } + \frac { y ^ { 2 } } { 64 } = 1$
D) $\frac { x ^ { 2 } } { 48 } + \frac { y ^ { 2 } } { 64 } = 1$