In january 2016, united airlines (ual) had a market capitalization of $ 20.43 billion, debt of $ 11.88 billion, and cash of $ 5.25 billion. united airlines had revenues of $ 38.49 billion. southwest airlines (luv) had a market capitalization of $ 27.51billion, debt of $ 3.38 billion, cash of $ 2.97 billion, and revenues of $ 19.73 billion. a. compare the market capitalization-to-revenue ratio (also called the price-to-sales ratio) for united airlines and southwest airlines. b. compare the enterprise value-to-revenue ratio for united airlines and southwest airlines. c. which of these comparisons is more meaningful