People differ in their willingness to pay for air travel and airlines would like to charge different prices to different people. Airlines typically attempt to divide passengers into two types: leisure travelers and business travelers. Suppose that an airline is charging $400 per ticket for all passengers on flights between New York and Washington, D.C. The accompanying tables provide information on quantity demanded for air travel for leisure travelers and business travelers. 

Using the midpoint method, calculate and describe the price elasticity of demand for both types of passengers if the airline increases prices to $500. Calculate the change in total revenue for each group.

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Price per ticket $400 $500 Price per ticket $400 $500 Leisure travelers Quantity of tickets per flight Business travelers 100 50 Quantity of tickets per flight 100 90