#FIG 3.2 Produced by xfig version 3.2.7 Portrait Center Inches Letter 100.00 Single -2 1200 2 1 3 0 1 0 0 50 -1 43 0.000 1 0.0000 3750 2550 75 75 3750 2550 3750 2625 1 3 0 1 0 0 50 -1 43 0.000 1 0.0000 3750 3450 75 75 3750 3450 3750 3525 1 3 0 1 0 0 50 -1 43 0.000 1 0.0000 4200 3000 75 75 4200 3000 4200 3075 1 3 0 1 0 0 50 -1 43 0.000 1 0.0000 3750 3000 75 75 3750 3000 3750 3075 1 3 0 1 0 0 50 -1 43 0.000 1 0.0000 5400 3000 75 75 5400 3000 5400 3075 1 3 0 1 0 0 50 -1 43 0.000 1 0.0000 5850 3450 75 75 5850 3450 5850 3525 1 3 0 1 0 0 50 -1 43 0.000 1 0.0000 5850 2550 75 75 5850 2550 5850 2625 1 3 0 1 0 0 50 -1 43 0.000 1 0.0000 6300 3000 75 75 6300 3000 6300 3075 2 1 0 1 0 0 50 -1 -1 0.000 0 0 -1 0 0 3 3750 2550 3750 3450 4200 3000 2 1 0 1 0 0 53 -1 10 0.000 0 0 -1 0 0 4 5850 2550 5400 3000 5850 3450 5850 2550 2 1 0 1 0 0 50 -1 10 0.000 0 0 -1 0 0 2 5850 3450 6300 3000 4 0 0 50 -1 0 12 0.0000 2 180 525 3450 2550 $u_3$\001 4 0 0 50 -1 0 12 0.0000 2 180 525 3450 3000 $u_2$\001 4 0 0 50 -1 0 12 0.0000 2 180 525 3450 3525 $u_1$\001 4 0 0 50 -1 0 12 0.0000 2 180 525 5550 3525 $u_1$\001 4 0 0 50 -1 0 12 0.0000 2 180 525 4275 3000 $u_4$\001 4 0 0 50 -1 0 12 0.0000 2 180 525 5100 3000 $u_2$\001 4 0 0 50 -1 0 12 0.0000 2 180 525 5550 2550 $u_3$\001 4 0 0 50 -1 0 12 0.0000 2 180 525 6375 3000 $u_4$\001