| f |  |
|
|
|
|
|
|
| e | |
 |
|
|
|
|
|
| d | |
|
|
 |
|
|
|
| c | |
|
|
|
|
|
|
| b | |
|
|
|
|
 |
|
| a | |
|
|
|
|
|
|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
---
