C1 | C | C1 – C |
A2 | A | A2 – A |
B2 | B | B2 – B |
C2 | C | C2 – C |
A3 | (A1 + A2)/2 | A3 – (A1 + A2)/2 |
B3 | (B1 + B2)/2 | B3 – (B1 + B2)/2 |
C3 | (C1 + C2)/2 | C3 − (C1 + C2)/2 |