What is the equation of the parabola with a directrix at y = -4 and focus (0, 4)?

What is the equation of the parabola with a directrix at y = -4 and focus (0, 4)?

x = -(1/16)y^2

y = -(1/16)x^2

y = (1/16)x^2

x = (1/16)y^2

Write the equation of a parabola with a vertex at (0, 0) and a focus at (0, -5).

x = -(1/20)y^2

y = -(1/20)x^2

y = (1/20)x^2

x = (1/20)y^2

What is the equation of a parabola with a vertex at (0, 0) and a directrix x = 4?

y = -(1/16)x^2

x = -(1/16)y^2

x = (1/16)y^2

y = (1/16)x^2