320 349.5 384 349.5 383 159.5 320 158.5 u 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e $x_1$ $x_2$ 320 349.5 384 349.5 383 159.5 320 158.5 u 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e 320 349.5 384 349.5 383 159.5 320 158.5 u 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e $x_3$ $z_1$ $z_2$ $z_3$ $y_1$ $y_2$ $y_3$ 175 302.692308 m 337.307692 303.461538 l 338.846154 303.461538 m 489.615385 301.923077 l 490.384615 301.153846 m 175.769231 207.307692 l 490.384615 301.153846 m 176.538462 259.615385 l 491.923077 255.769231 m 337.307692 269.615385 l 336.538462 269.615385 m 175.769231 258.076923 l 177.307692 257.307692 m 490.384615 206.538462 l 177.307692 207.307692 m 335.769231 207.307692 l 490.384615 205.769231 l 177.307692 207.307692 m 490.384615 257.307692 l 490.384615 257.307692 m 176.538462 303.461538 l 176.538462 303.461538 m 490.384615 205.769231 l 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e $u$ $v$ 320 349.5 384 349.5 383 159.5 320 158.5 u 2.95858 0 0 2.95858 176.775148 307.751479 e $N_0$ 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e 176.183432 162.781065 m 489.792899 301.242604 l 176.775148 162.781065 m 4185.031668 0 0 -4185.031668 1543.94721 -3792.636816 489.792899 257.455621 a 175 161.597633 m 490.976331 205.976331 l 176.183432 162.189349 m 492.751479 162.781065 l 175 207.159763 m 490.384615 163.372781 l 177.366864 258.639053 m 1718.760938 0 0 -1718.760938 -164.289381 -1425.822336 490.384615 163.372781 a 175.591716 303.017751 m 490.384615 163.964497 l $x_4$ $z_4$ $y_4$ 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e $w_1$ $w_2$ $w_3$ $w_4$ $w_5$ $w_6$ $w_0$ 271.449704 103.017751 m 337.721893 82.899408 l 337.130178 82.307692 m 296.893491 101.83432 l 322.337278 102.426036 m 336.538462 83.491124 l 337.130178 81.12426 m 350.739645 103.609467 l 272.04142 105.384615 m 94.028864 0 0 -94.028864 334.294926 175.853959 334.763314 269.881657 a 272.633136 106.568047 m 365.903471 0 0 365.903471 68.9856 410.563165 337.130178 161.597633 a 2.95858 0 0 2.95858 176.775148 307.751479 e 2.95858 0 0 2.95858 176.775148 307.751479 e 338.011574 82.451868 m 448.161082 95.196439 340.28739 162.560601 s 338.011574 83.362194 m 464.091796 95.651602 338.466737 208.53209 s 337.55641 81.996705 m 479.112184 95.651602 338.011574 269.97913 s 336.190921 82.451868 m 496.408388 95.196439 338.9219 303.206048 s