Here is the problem

Give examples of three sets

1.A (subset) B (proper subset) c

2. Ais in B, B is in C and A is not a part of C

3. Ais in B and A (propersubset) C

My answers

1. A= {0,1,2} B=(-1,{0,1,2}, 3} c= {-1,3}

2.A = {1} B= {{1},2,3} c= ?

3. A= {1,2,3} B= {0,1,2,3,4} C= {{1,2},4}

any help?are they right? wrong? where am i confused? any help thanks