On Page 20, we defined three languages L1, L2, and L3. Answer these questions with respect to these languages. (a) List the three shortest strings in L 3 1 . (b) List a string of length 6 in L2 that is not in L n 1 for any n. (c) What is the shortest string common to L 0 1 , L 0 2 , and L 0 3 , and why?
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