Step-by-step explanation:
1. {}
2. {1}
3. {2}
4. {1,2}
5. {3}
6. {1,3}
7. {2,3}
8. {1,2,3}
9. {4}
10. {1,4}
11. {2,4}
12. {1,2,4}
13. {3,4}
14. {1,3,4}
15. {2,3,4}
16. {5}
17. {1,5}
18. {2,5}
19. { 1,2,5}
20. {3,5}
21. {1,3,5}
22. {4,5}
23......
likewise do this u will get it