1. (10 pts each) Use the Boolean Postulates and Theorems (table 2.2 of the textbook) to simplify the following expressions as far as possible. Show and justify each step by citing the theorem or postulate used f(A,B,C,D) = ABC + AB+ ABC + AC + ABC a, b. c. f(W,X,Y.Z) = (W +Y+2)(X + Y)(W + X +Z)(X + Y)(X + Y +Z) f(A,B.C) - (A+BXA+AB(A+B+ABC)+(A+BXA+C) 2. (10 pts each) Given each function shown, take its complement and then use DeMorgan's theorem to eliminate all group complements from your final expression. (Taking the complement simply means to place a bar over the entire expression.) a. XY+Z(Q+R)) c. (A+BCXA+DE)