1. Simplify the following Boolean expressions to a minimum number of literals. a) (x + y)(x + y') b) xyz + x'x + xyz' c) (x + y)'(x' + y')' d) xyz + xyz' + xyz + x'Yz' e) (x + y)'(x' + y') f) (x' + Z') (x + y' + z') g) XX + x(wz + wz') h) wxx'z + w'xz + WXYZ