In each of the following, determine whether the statement is true or false. If it is true, prove it. If it is false, give an example.
- If x∈A and A∈B, then x∈B
- If A⊂B and B∈C, then A∈C
- If A⊂B and B⊂C, then A⊂C
- If A⊂B and B⊂C, then A⊂C
- If x∈A and A⊂B, then x∈B
- If A⊂B and x∈/B, then x∈/A