please answer question 17 and 20

Q17. According to spin-spin splitting (n + 1) rule, show some commonly observed splitting patterns. (12 points) --- H2 X-C-CY X-C-CY H3CCH H3C-CH2 H3C CH- H2C Q20. Classify each type of chemically distinct protons by A, B, C, D, or E and predict 'H NMR chemical shifts of each type of chemically distinct protons in this molecule from the table at the end? (20 points) H3C CH3