the answer is not 11.22% nor 5.090 please

Your firm is considering purchasing a machine with the following annual, end-of-year, book investment accounts. Gross investment Less: Accumulated depreciation Net investment Purchase Date $56,000 0 $56,000 Year 1 $56,000 14,000 $ 42,000 Year 2 $56,000 28.000 $20,000 Year 3 $56,000 42,000 $14,000 Year 4 $56,000 56,000 $ 0 The machine generates, on average, $5,500 per year in additional net income. What is the average accounting return for this machine? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) AAR 11.22 %