File for adv_graph.txt is located at this link: https://www.4shared.com/office/sm8j0fMAca/adv_graph.html

Let me know if the link does not work, or if you know of a better file sharing site.

2. The experimental data from a wind tunnel test has been saved to a file called adv graph.txt. This file contain performance characteristics for an airfo it lists velocity (ft/s), Reynolds number, angle of attack (deg), lift coefficient, pressure drag coefficient and moment coefficient, respectively. Plot the Lift coefficient vs angle of attack on the left axis and Moment Coefficient vs angle of attack on the right axis