Answer these questions for each of the given functions.
i. Is ƒ one-to-one? Justify your answer.
ii. Is ƒ onto? Justify your answer.
iii. Is ƒ bijective? If yes, find f−1.
(a) ƒ: 2Z → Z is defined by ƒ (a) =.
(b) f: Q → Q is defined by .
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