1. Find the interior and the boundary for each of the following sets. Classify it as open, closed, or neither open nor closed. Is it a compact subset of R? a. A = n(-2-1+4) NEN intA= bdA= A is closed / open / neither closed nor open A is compact / not compact b. B={(-1)"+:neN} intB bdB B is closed / open / neither closed nor open B is compact / not compact c. C = {x € Q+ : a² ≤ 2} intC= bdC= C is closed / open / neither closed nor open C is compact / not compact

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