| 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 | |