Mark each statement True or False. Justify each answer.(a) Two sets S and T are equinumero...

Mark each statement True or False. Justify each answer.

(a) Two sets S and T are equinumerous if there exists a bijection f: S → T.

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(b) If a set S is finite, then S is equinumerous with In for some .

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(c) If a cardinal number is not finite, it is said to be infinite.

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(d) A set S is denumerable if there exists a bijection

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(e) Every subset of a countable set is countable.

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(f) Every subset of a denumerable set is denumerable.