Question: For each of these sets, Construct a PDA (which accepts by empty stack) for it: a) The set of strings over {a, b} such that

For each of these sets, Construct a PDA (which accepts by empty stack) for it:

a) The set of strings over {a, b} such that twice the number of as equals three times the number of bs

b) The set of strings over {a, b} in which every prefix contains at least as many as as bs

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