Chapter 1 √ √ √ 267 2 4. LetA = (2, −4),B = (−6, 3),C = (π, π ),D = (− 5, 8),E = ( 2π, −3), F = (1/3, −19/4). y C B D x E A F Fig. S1.4 5. Fig. S1.5(a) Fig. S1.5(b)