Consider the set of sequences X = {(xn): xn € {0,1}, n € N} and Y = {(x₂) € X | x₂ = 1 for at most finitely many n (a)X is countable, Y is finite. (b)X is uncountable, Y is countable. (c)X is countable, Y is uncountable. rish (d)y259614 uncountable, Y is uncountable.

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