| 1. | | | | | | | | | | | | | | | | | | | | | | | | | 2. 1 | | | 2 | | 3 | 4 | | 1 1 2 | 15~30 | 5 | 10 15 1 | 3 5 | 50% 500 | ~ 800 70% | 600~800 50% 800~1000 | |