Find the equation of the parabola with its focus at (-7,6) and its directrix at y = 4.
A) y = 1/4(x + 5)2 + 7
B) y=1/8(x + 7)2 + 5
C) y=1/4(x - 7)2 + 5
D) y = 1/4(x + 7)2 + 5