In Exercises 1-4, find the vertex, focus, and Directix of the parabola. Then sketch the parabola.
1. (x − 1)2 + 8(y + 2) = 0
2. (x + 2) + (y − 4)2 = 0
3. (y + 1 / 2)2 = 2(x − 5)
4. (x + 1 / 2)2 = 4(y − 3)