3. Reduce the following Boolean expressions to the indicated number of literals a.Ga = a'·c' + a·b•c + a•c' to three literals b. Gb = a'b·(d' +c'·d) + b-(a +

a'·c·d) to one literal с. Gc = a-b.c·d + a'·b•d + a·b·c'·d to two literals