x1 x2 x3 y 1 0 0 540 1 0 0 560 0 1 0 330 0 1 0 350 0 0 1 295 0 0 1 260 2 2 0 610 0 2 2 330 2 0 2 425 1.5 6 6 710 6 1.5 6 640 6 6 1.5 460 3 3 3 800 3 3 3 850