Derive the equation of the parabola with a focus at (−7, 5) and a directrix of y = −11.
a. f(x) = one thirty second (x + 7)2 − 3
b. f(x) = −one thirty second (x + 7)2 − 3
c. f(x) = −one thirty second (x − 7)2 − 3
d. f(x) = one thirty second (x − 7)2 − 3