a. Divide 0.6-0.3 in 3 equal parts: each part is 0.1, so label 0.4 and 0.5
b. Extrapolate with +0.02: label 0.15, 0.17
c. Divide 0.12-0.03 in 3 equal parts. 0.09/3=0.03, so label 0.06, 0.09
d. Extrapolate with -0.25: label 0.25, 0 (from right to left)