xl = 350;  yl = 456.22720871694<br>xl = 355;  yl = 453<br>xl = 500;  yl = 381.644617255<br>xl = 600;  yl = 348.3631381793<br>xl = 1000;  yl = 269.77769934385<br>xl = 1100;  yl = 257.21169733318<br>xl = 1400;  yl = 227.9685794056<br>xl = 1450;  yl = 224<br>xl = 1600;  yl = 212.36939360502<br>xl = 1750; yl = 202.30770750997<br>xl = 1900;  yl = 193.49401368876<br>xl = 2000;  yl = 188.19227594477<br>xl = 2200;  yl = 178.72361858732<br>xl = 2450;  yl = 168.60247738149<br>xl = 2700;  yl = 159.95878273245<br>xl = 3050;  yl = 149.73933768103<br>xl = 3078;  yl = 149<br>xl = 3100;  yl = 148.42632688331<br>xl = 3300;  yl = 143.48425777393<br>xl = 3500;  yl = 138.98348102286<br>xl = 3550;  yl = 137.91977135525<br>