Hoi is considering an investment proposal with the following cash flows: Intial investment-depreciable assets $90,000 Net cash inflows from operations (per year for 5 years) 20,000 Disinvestment-depreciable assests 0 a. Determine the payback period. Show work. b. Determine ther accounting rate of return on intial investment. Show work. c. Determine the accounting rate of return on average investment. Show work