Vernon Airline Company is considering expanding its territory. The company has the opportunity to purchase one of two different ased airplanes, The first airplane is expected to cost $15,500,000; it wilt enable the company to increase its annual cosh inflow by $6,200,000 per year. The piane is expected to have a useful life of five years and no salorge vatue. The second plane costs $27,540,000 : it will enabte the company to increase annual cash flow by $8,100,000 per year, This plane has an eight-year useful iffe and a zero salvage value, Required a. Defermine the payback period for each investment altemative and identify the olternative vernon should occept if the decision is bosed on the payback approach, (Round your answers to 1 decimal place.)