Question 14a

figure 1 grey → 1 × 2 = 2 figure 2 grey → 2 × 2 = 4 figure 3 grey → 3 × 2 = 6 figure 4 grey → 4 × 2 = 8 figure 5 grey → 4 × 2 = 10

figure 1 white → 3 figure 2 white → 3 + 2 = 5 figure 3 white → 5 + 2 = 7 figure 4 white → 7 + 2 = 9 figure 5 white → 9 + 2 = 11