| 1. 1 1 | 5 6 20 | | 2. 80 100 50 250 | | | 3. 4 5 | | 80 | 4. 10 20 1 2 3 | 5. | 2 3 0.1 0.25 | 200 300 3 5 | 6. | | 7. 20° 30° | 8. 1000 ppm 2 3 | 2000 ppm B9 | 9. |