Question: 4. Let S = {a,b}. Let L be the language corresponding to the regular expression (a + b)(ab+ba)* a) Give three strings in that are

4. Let S = {a,b}. Let L be the language corresponding to the regular expression (a + b)(ab+ba)* a) Give three strings in that are pairwise distinguishable with respect to L. Show that they are pairwise distinguishable by providing appropriate distinguishing strings. b) Give two strings in * that are indistinguishable with repect to L (where L is defined above)

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