4. Let U := Letters in the English Alphabet = {a, b, c, ...,x, y, z} A = {t, r, i, a, n, g, I, e, s} B = {s, q, u, a, r, e }, C = {h, e, x, a, g, o, n, s } %3D Determine the following: (a) AU(BnC) (b) (AUBYNC (c) (AnC)u(BnC) (d) An (Cnuy (e) n[(AU B)n (BUuC)]

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