#FIG 3.2 Produced by xfig version 3.2.5 Landscape Center Inches Letter 100.00 Single -2 1200 2 6 1500 1200 2100 1500 1 3 0 1 0 7 50 -1 -1 0.000 1 0.0000 1800 1350 150 150 1800 1350 1950 1350 4 1 0 50 -1 0 11 0.0000 2 195 465 1800 1425 T$_2$\001 -6 6 1050 1200 1650 1500 1 3 0 1 0 7 50 -1 -1 0.000 1 0.0000 1350 1350 150 150 1350 1350 1500 1350 4 1 0 50 -1 0 11 0.0000 2 195 465 1350 1425 T$_1$\001 -6 6 1950 1200 2550 1500 1 3 0 1 0 7 50 -1 -1 0.000 1 0.0000 2250 1350 150 150 2250 1350 2400 1350 4 1 0 50 -1 0 11 0.0000 2 195 465 2250 1425 T$_3$\001 -6 6 1275 1800 1875 2100 2 2 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 5 1425 1800 1725 1800 1725 2100 1425 2100 1425 1800 4 1 0 50 -1 0 11 0.0000 2 195 495 1575 2025 H$_1$\001 -6 6 1725 1800 2325 2100 2 2 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 5 1875 1800 2175 1800 2175 2100 1875 2100 1875 1800 4 1 0 50 -1 0 11 0.0000 2 195 495 2025 2025 H$_2$\001 -6 6 2475 1800 2775 2100 2 2 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 5 2475 1800 2775 1800 2775 2100 2475 2100 2475 1800 4 1 0 50 -1 0 11 0.0000 2 135 135 2625 2025 G\001 -6 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 1 2 0 0 1.00 45.00 90.00 0 0 1.00 45.00 90.00 1275 1500 1500 1800 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 1 2 0 0 1.00 45.00 90.00 0 0 1.00 45.00 90.00 1425 1500 1950 1800 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 1 2 0 0 1.00 45.00 90.00 0 0 1.00 45.00 90.00 1725 1500 1650 1800 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 1 2 0 0 1.00 45.00 90.00 0 0 1.00 45.00 90.00 1875 1500 2025 1800 2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 1 1 2 0 0 1.00 45.00 90.00 0 0 1.00 45.00 90.00 2250 1500 2100 1800 4 0 0 50 -1 0 11 0.0000 2 135 240 3075 2025 OS\001 4 1 0 50 -1 0 11 0.0000 2 195 1320 2325 2025 $\\Leftrightarrow$\001 4 1 0 50 -1 0 11 0.0000 2 195 1320 2925 2025 $\\Leftrightarrow$\001