Example 0.3.3.

Let \(A = \{1, 2, 3, 4, 5, 6\}\text{,}\) \(B = \{2, 4, 6\}\text{,}\) \(C = \{1, 2, 3\}\) and \(D = \{7, 8, 9\}\text{.}\) Determine which of the following are true, false, or meaningless.

1. \(A \subset B\text{.}\)

2. \(B \subset A\text{.}\)

3. \(B \in C\text{.}\)

4. \(\emptyset \in A\text{.}\)

5. \(\emptyset \subset A\text{.}\)

6. \(A \lt D\text{.}\)

7. \(3 \in C\text{.}\)

8. \(3 \subset C\text{.}\)

9. \(\{3\} \subset C\text{.}\)