Payback Period and Accounting Rate of Return: Equal Annual Operating Cash Flows with Disinvestment Roopali is considering an investment proposal with the following cash flows: Initial investment-depreciable assets Initial investment-working capital Net cash inflows from operations (per year for 8 years) Disinvestment-depreciable assets Disinvestment-working capital $28,000 4,000 8,000 4,000 2,000 For parts b. and c., round answers to three decimal places, if applicable. a. Determine the payback period. years b. Determine the accounting rate of return on initial investment c. Determine the accounting rate of return on average investment