In a short paper, first explain the theory of 3 rd degree price discrimination as it applies to the airline industry including a graphical model. Explain how and why airlines would choose to practice price discrimination. Next, discuss your research methodology including the choice of airlines, the itinerary, and source data. Then, present the data. A simple table may be the best method for showing the itineraries and fares. Finally, discuss whether the data provide evidence of price discrimination. Draw appropriate conclusions.