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Please answer a-f

Answer all the following questions. (a) Find a CFG for the language defined by a (b) Find a CFG for the language defined by b (c) Find a CFG for the language defined by ab. (d) Find a CFG for the language defined by ab. (e) Find a CFG for the language defined by ab2n. (f) Find a CFG for the language defined by an + b 2n.

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