每个班级的最大人数是多少？
请参考下表
| Beginner level: | 12 (Students/teacher: 12/1) |
|---|---|
| Intermediate level: | 12 (Students/teacher: 12/1) |
| High Intermediate level: | 12 (Students/teacher: 12/1) |
| Advance level: | 12 (Students/teacher: 12/1) |
| High-Advanced level: | 12 (Students/teacher: 12/1) |
