Hi, I pealse need an explanation for the following problems. I have no clue..

a)Find the vertex, focus, and directrix of the parabola of the follwing exercices and sketh the graph of the parabola.

1) x^2 +8y = 0

2) (x-1)^2 + 8 (y+2) = 0

3) y^2 + 6y + 8x + 25 = 0

b) Find an equation of parabola of the following exercices

4) vertex: (-1, 2)

focus: (-1,0)

5) focus: (2, 2)

directrix: x= -2

6) When axis is parallel to y-axis; and when graph passes through (0, 3) , (3, 4), and (4, 11).