7-1; 8-2; 9-2; 10-2; 11-2; 12-4; 13-3; 14-2; 15-3; 16-2; 17-4; 18-2;19-4; 20-1
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7-1; 8-2; 9-2; 10-2; 11-2; 12-4; 13-3; 14-2; 15-3; 16-2; 17-4; 18-2;19-4; 20-1
Verified answer
7. 18. 4
9. 4
10. 2
11. 2
12. 4
13. 3
14. 1
15. 1
16. 4
17. 4
18. 2
19. 3
20. 1
21. 2
22. 1
23. 2
24. 4
25. 1
26. 2