Find the Focus and Directrix of the Parabola $x ^ { 2 } = 36 y$

Multiple Choice

Find the focus and directrix of the parabola.
- $x ^ { 2 } = 36 y$

A) (9, 0) ; y = 9
B) (0, -9) ; x = - 9
C) (9, 0) ; x = 9
D) (0, 9) ; y = -9