Let A = {a, b, c, d, e} and B = {a, b, c, d, e, f, g, h}. Find

Let A = {a, b, c, d, e} and B = {a, b, c, d, e, f, g, h}. Find

a) A ∪ B.
b) A ∩ B.
c) A − B.
d) B − A.