3. Compute AUB, A* and AB for the following A and B A={ab*|c} and B={d} Draw three DFAs to accept AUB, A* and AB for the following A and B. A={ab*|c} and B={d} What languages the following two grammars individually generate ? Grammar 1 A a A aB B c B d Grammar 2 A aC A aB B cB B C Build grammars for each of the following regular languages : Language 1: a*bc Language 2: a+bc*