Baird Rentals can purchase a van that costs $110,000; it has an expected useful life of five years and no salvage value. Baird uses straight-line depreclation. Expected revenue is $40,425 per year, Assume that depreciation is the only expense associated with this investment. Required a. Determine the payback period. Note: Round your answer to 1 decimal place. b. Determine the unadjusted rate of return based on the average cost of the investment. Note: Round your answer to 1 decimal place. (1.e., .234 should be entered as 23.4)