Question: Determine whether or not the given set is (a) open, (b) connected, and (c) simply-connected. {(x, y) | 1 < x 2 9+ y 2

Determine whether or not the given set is (a) open, (b) connected, and (c) simply-connected.

{(x, y) | 1 < x2 9+ y2 < 4, y > 0

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