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Determine which of the following spaces are connected. (a). X= {1,2,3,4} and T = {X, ∅,...

Determine which of the following spaces are connected. (a). X= {1,2,3,4} and T = {X, ∅, {1}, {2, 3}, {1, 2, 3}}. (b). X = ℝ and T = co-finite topology.

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