1, boys:

Excellent: 13.2 to16.2cm.

Ok: 10.6 to11.9cm.

Pass: -0.4 to 9.5 cm

Failure: -4.4 to-1.2cm.

2. Girls:

Excellent: 16.3 to 18.9 cm.

Good: 13.3 to 14.8 cm.

Pass: 2.3 to 12.2 cm

Failure:-1.7 to1.5cm.