Select the quadratic that has roots x=8 and x=-5 a: x^2+3x-40 b: x^2-3x-40 c: x^2+13x+40 d: x^2-13x+40

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}