Bailey Airline Company is considering expanding its territory. The company has the opportunity to purchase one of two different used airplanes. The first airplane is expected to cost $17,820,000; it will enable the company to increase its annual cash inflow by $6,600,000 per year. The plane is expected to have a useful life of five years and no salvage value. The second plane costs $36,800,000; it will enable the company to increase annual cash flow by $9,200,000 per year. This plane has an eight-year useful life and a zero salvage value. Required a-1. Determine the payback period for each investment alternative. (Round your answers to 1 decimal place.)

Alternative 1:

Alternative 2: