Question: 4. (25 points) Please use the pumping lemma to prove that the following language is not regular. Recall that string r is a palindrome ifr-R.

4. (25 points) Please use the pumping lemma to prove that

4. (25 points) Please use the pumping lemma to prove that the following language is not regular. Recall that string r is a palindrome ifr-R. L is a palindrome over alphabet -{a, b}

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