2) Consider a 6-variable Boolean function f(x1, X2, X3, X4, X5, X6)= fi(X1, X2, X3, Xa). f2(x4, X5, X6) where fi(x1, X2, X3, Xa) =11(1,2,3,5,7,12,14) - Xi is the most significant bit and f2(x4, X5, X6) =11 (3,4,5,6,7) - X4 is the most significant bit. a) Obtain a minimal sum-of-product (SOP) expression for fi and f2 with minimum literal counts. b) Obtain a minimal product-of-sum (POS) expression for f with a minimum literal count