2. Find the interior, the boundary, the set of all accumulation points, and the closure of each set. Classify it as open, closed, or neither open nor closed. Is it a compact subset of R? a. A = U[-², ¹-A nEN int A = bdA= A' = clA = A is closed / open / neither closed nor open A is compact / not compact b. B = {(-":ne N} int B = bd B = B' = dB = B is closed / open / neither closed nor open B is compact / not compact c. C = {re Q:r² ≥ 1} intC= bdC= C' = clC= C is closed / open / neither closed nor open C is compact / not compact Q Search DELL

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