#FIG 3.2 Produced by xfig version 3.2.5-alpha5 Landscape Center Metric A4 85.00 Single -2 1200 2 0 32 #c9c9c9 0 33 #dfd8df 0 34 #cccccc 1 3 0 1 0 7 50 -1 -1 0.000 1 0.0000 2430 270 255 255 2430 270 2610 450 1 3 0 1 0 7 50 -1 -1 0.000 1 0.0000 5310 270 255 255 5310 270 5490 450 1 3 0 1 0 7 50 -1 -1 0.000 1 0.0000 8190 270 255 255 8190 270 8370 450 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 8190 810 5265 1035 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 8190 540 8190 4185 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 2430 630 5355 855 2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 5310 900 2385 1125 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 1 2 0 0 1.00 60.00 120.00 8235 810 8550 810 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 1 2 0 0 1.00 60.00 120.00 2385 630 2115 630 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 2430 1485 5355 1710 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 2430 1215 5355 1440 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 2430 540 2430 4185 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 2430 1710 5355 1935 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 2430 1980 5355 2205 2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 5310 1800 8235 2025 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 8190 2205 5265 2430 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 5310 540 5310 4185 2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 5310 2790 2385 3015 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 8189 2461 5264 2686 2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 5312 3724 2387 3949 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 1 2 0 0 1.00 60.00 120.00 8235 3015 8550 3015 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 8189 2700 5264 2925 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 8193 2956 5268 3181 2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 5308 3250 8233 3475 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 2428 3181 5353 3406 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 0 2 2 1 1.00 60.00 120.00 2425 3440 5350 3665 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 1 2 0 0 1.00 60.00 120.00 2385 3420 2115 3420 4 0 0 50 -1 0 12 0.0000 2 180 525 2340 360 $S_1$\001 4 0 0 50 -1 0 12 0.0000 2 165 345 5220 360 $R$\001 4 0 0 50 -1 0 12 0.0000 2 180 525 8100 360 $S_2$\001 4 0 0 50 -1 0 12 0.0000 2 135 360 8595 855 TXS\001 4 0 0 50 -1 0 12 0.0000 2 165 720 3780 1530 $\\vdots$\001 4 0 0 50 -1 0 12 0.0000 2 135 360 1620 675 TXS\001 4 0 0 50 -1 0 12 0.0000 2 165 720 3780 2025 $\\vdots$\001 4 0 0 50 -1 0 12 0.0000 2 165 720 6750 2520 $\\vdots$\001 4 0 0 50 -1 0 12 0.0000 2 135 360 8595 3060 TXF\001 4 0 0 50 -1 0 12 0.0000 2 165 720 6750 3015 $\\vdots$\001 4 0 0 50 -1 0 12 0.0000 2 165 720 3780 3510 $\\vdots$\001 4 0 0 50 -1 0 12 0.0000 2 135 360 1620 3465 TXF\001