1. A combinational circuit has four inputs (A, B, C,D) and three outputs (X, Y, Z). XYZ represents a
binary number whose value equals the number of0's at the input. For example if ABCD = 1011,
then XYZ 001.
(a) Find the minterm expansions for X, Y, and Z. (Disjunction)
(b) Find the maxterm expansions for Y and Z. (Conjunction)