Question: a. Show that if M is a DFA that recognizes language B, swapping the accept and nonaccept states inM yields a new DFA recognizing the

a. Show that if M is a DFA that recognizes language B, swapping the accept and nonaccept states inM yields a new DFA recognizing the complement of B. Conclude that the class of regular languages is closed under complement.

b. Show by giving an example that if M is an NFA that recognizes language C, swapping the accept and nonaccept states in M doesn’t necessarily yield a new NFA that recognizes the complement of C. Is the class of languages recognized by NFAs closed under complement? Explain your answer.

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