Find the Foci of the Ellipse $49 x ^ { 2 } + 64 y ^ { 2 } = 3136$

Multiple Choice

Find the foci of the ellipse.
- $49 x ^ { 2 } + 64 y ^ { 2 } = 3136$

A) $( 0 , \pm \sqrt { 15 } )$
B) $( \pm 8,0 )$
C) $( \pm \sqrt { 15 } , 0 )$
D) $( \pm 7,0 )$