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Hi, I have managed to answer all the questions correctly. Please find the answers as below.

1) 1 2) 4 3) 2 4) 2-4 5) 2 6) 1 7) 1-2 8) 4 9) 1-2 10) 1 11) 1-2 12) 1-4 13) 1-3-4 14) 3 15) 3 16) 2-4 17) 1-2-3 18) 3 19) 3 20) 4

Thank you.