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1. False. For example, \(1\in A\) but \(1 \notin B\text{.}\)

2. True. Every element in \(B\) is an element in \(A\text{.}\)

3. False. The elements in \(C\) are 1, 2, and 3. The set \(B\) is not equal to 1, 2, or 3.

4. False. \(A\) has exactly 6 elements, and none of them are the empty set.

5. True. Everything in the empty set (nothing) is also an element of \(A\text{.}\) Notice that the empty set is a subset of every set.

6. Meaningless. A set cannot be less than another set.

7. True. \(3\) is one of the elements of the set \(C\text{.}\)

8. Meaningless. \(3\) is not a set, so it cannot be a subset of another set.

9. True. \(3\) is the only element of the set \(\{3\}\text{,}\) and is an element of \(C\text{,}\) so every element in \(\{3\}\) is an element of \(C\text{.}\)