Observation
A
B
C
1
0
−a
−b
2
0
a
−b
3
0
−a
b
4
0
a
b
5
−a
−b
0
6
a
−b
0
7
−a
b
0
8
a
b
0
9
−b
0
−a
10
b
0
−a
11
−b
0
a
12
b
0
a
| Observation |
| A |
| B |
| C |
| 1 | 0 |
| −a |
| −b |
|
| 2 | 0 |
| a |
| −b |
|
| 3 | 0 |
| −a |
| b |
|
| 4 | 0 |
| a |
| b |
|
| 5 | −a |
| −b |
| 0 |
|
| 6 | a |
| −b |
| 0 |
|
| 7 | −a |
| b |
| 0 |
|
| 8 | a |
| b |
| 0 |
|
| 9 | −b |
| 0 |
| −a |
|
| 10 | b |
| 0 |
| −a |
|
| 11 | −b |
| 0 |
| a |
|
| 12 | b |
| 0 |
| a |
|