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1) Consider the language L = L1 ∩ L2, where L1 = {ww^R : w ∈ {a, b}* and L2 = {a^n b*a^n: n ≥ 0}.
a) List the first four strings in the lexicographic enumeration of L?
b) Write a context-free grammar to generate L.
c) Show a natural pda for L.
d) Prove that L is not regular.
How many equivalence classes does this relation have and what are they? Use these equivalence classes to construct the minimal DFA for the language.
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