Find the grammars for S = {a, b} that generate the sets of: 1. all strings with exactly two a’s 2. a

Find the grammars for Σ = {a, b} that generate the sets of: 1. all strings with exactly two a’s 2. all strings with at least two a’s 3. all strings with no more than three a’s 4. all strings with at least three a’s Attached

 

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