| C1 | C2 | C3 | C4 |
C1 | 1 | 2 | 2 | 2 |
C2 | 0.5 | 1 | 2 | 0.5 |
C3 | 0.5 | 0.5 | 1 | 0.5 |
C4 | 0.5 | 2 | 2 | 1 |
| 2.5 | 5.5 | 7 | 4 |