xl = 355;  yl = 453<br>xl = 400;  yl = 426.7353349483<br>xl = 600;  yl = 348.3631381793<br>xl = 800;  yl = 301.65151474981<br>xl = 1000;  yl = 269.77769934385<br>xl = 1200;  yl = 246.25162181031<br>xl = 1400;  yl = 227.9685794056<br>xl = 1450; yl = 224<br>xl = 1600;  yl = 212.36939360502<br>xl = 1800;  yl = 199.24424406062<br>xl = 2000;  yl = 188.19227594477<br>xl = 2200;  yl = 178.72361858732<br>xl = 2400;  yl = 170.49601533458<br>xl = 2600;  yl = 163.26224365496<br>xl = 2800;  yl = 156.83873016447<br>xl = 3000;  yl = 151.08595744736<br>xl = 3078; yl = 149<br>