Answer 1

K = {a, b, d, e, f}, L = {b, c, d, g} and M = {a, b, c, d, h}

K ∩ (L ∪ M)

(L ∪ M) = {b, c, d, g} ∪ {a, b, c, d, h}

= {a, b, c, d, g, h}

K ∩ (L ∪ M) = {a, b, d, e, f} ∩ {a, b, c, d, g, h}

= {a, b, d}