Question: Plzz solve..Thank you 2. (a) (4 points) Let (X, ) be a topological space and let A C X, then Inf(A), Ext(A) and Ad( A)

Plzz solve..Thank you

2. (a) (4 points) Let (X, ") be a topological space and let A C X, then Inf(A), Ext(A) and Ad( A) are mutually disjoint and X = Int(A) U Es( A) U Bd(A). (b) (4 points) Proof that "Every co-finite topological space (X, r) is separable&quot

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