Please show all work to get to answer.

Minn is considering an investment proposal with the following cash flows: Initial investment-depreciable assets $84,000 Net cash inflows from operations (per year for 10 years) 12,000 Disinvestment-depreciable assets 22,000 For parts b. and c., round answers to three decimal places, if applicable. a. Determine the payback period. 7 years b. Determine the accounting rate of return on initial investment. c. Determine the accounting rate of return on average investment