Write a regular expression for each of the following languages over {a,b}: • String of a's and b's that begin with a and end with b. • Strings that have at least two a's. • Strings that have an even number of a's. • Strings that do not have two a's in a row. • Strings that do not end with the substring ab.

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A: Answer:-

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A: The answer for the above question is as follows

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A: please do upvote for my efforts!   answer: we can use pumping lemma to prove it

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Q: Alert dont submit AI generated answer.

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