Question: we have shown that if M is a DFA that recognizes a language A then we can obtain a DFA M' that recognizes by swapping

we have shown that if M is a DFA that recognizes a language A then we can obtain a DFA M' that recognizes by swapping accept and non-accept states in M.

(a) Show, by giving an example, that if M is an NFA that recognizes a language B then we do not necessarily obtain an NFA recognizing language A then we can obtain a DFA M' that recognizes by by swapping accept and non-accept states in M.

(b) Is the class of languages recognized by NFAs closed under complement? Explain your answer.

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