Question: find grammars for sigma = b) 2 (a, b) that generate the sets of 11. Find grammars for (a) all strings with exactly one a.

find grammars for sigma =

b) 2 (a, b) that generate the sets of 11. Find grammars for (a) all strings with exactly one a. (b) all strings with at least one a. (c) all strings with no more than three a's. (d) all strings with at least three a's. In each case, give convincing arguments that the grammar you give does indeed generate the indicated language

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