Question

I have no idea how to figure the molecular structure and know what's present in this NMR/IR graph!

100 80- 4 0 20- 25 50 75 100 125 150 m/ z 1000 3000 166 74 1637 26 1306 72 1078 70 776 84 272 9 1567 84 1277 79 1013 52 721 6 2939 44 1451 55 1243 79 975 2 505 77 2680 49 ↓43g 6B | 1214 791 910 771 g75 77 2817 52 1423 68 1154 29 891 79 2735 58 1380 70 1142 29 842 84 492 4 1322 74 1099 41 834 8