Question: 4. Let Rev be the operator that reverses the sequence of characters within a string. For example, Rev(abc) = cba. Let R be any regular

4. Let Rev be the operator that reverses the sequence of

4. Let Rev be the operator that reverses the sequence of characters within a string. For example, Rev(abc) = cba. Let R be any regular expression. Rev(R) is the set of strings denoted by R, with each string reversed. Is Rev(R) a regular set? Why or why not

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