Question: Find a CFG for the language defined by a n b 2n , n=1, 2, 3, ... Group of answer choices a) a*(b+b)* b) S->aSbb|null

Find a CFG for the language defined by anb2n, n=1, 2, 3, ...

Group of answer choices

a) a*(b+b)*

b) S->aSbb|null

c) S->abbS|abb

d) S->aXbb|abb, X->aXbb|null

e) a*(bb)*

f) S->XY, X->aX|a, Y->bbY|bb

g) None of the above

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