Question: Problem 1. Prove that the following languages are not regular. You may use the pumping lemma or the closure of the class of regular languages

Problem 1. Prove that the following languages are not regular. You may use the pumping lemma or the closure of the class of regular languages under union, intersection, and complement. (a) L 02" : n 20) (b) L w': w E (a, b, where w stands for w with each occurrence of a replaced by b, and vice versa
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