Write the equation for a parabola with a focus at (6,-4) and a directrix at y = -7

If u good at math hit me up on insta or sum @basic_jaiden or @ and

Pls never taught i’m really confused and i rlly need

Let u = {q, r, s, t, u, v, w, x, y, z} a = {q, s, u, w, y} b = {q, s, y, z} c = {v, w, x, y, z}. list the elements in the set.a ∩ (b ∪ c)a) {q, s, w, y}b) {q, y, z}c) {q, s, u, w, y, z}d) {q, r, w, y, z}