Ritter Corporation’s accountants prepared the following financial statements for year-end 2021: (Do not round intermediate calculations.) RITTER CORPORATION Income Statement 2021 Revenue $ 850 Expenses 615 Depreciation 100 Net income $ 135 Dividends $ 115 RITTER CORPORATION Balance Sheet December 31 2020 2021 Assets Cash $ 65 $ 85 Other current assets 175 190 Net fixed assets 380 400 Total assets $ 620 $ 675 Liabilities and Equity Accounts payable $ 125 $ 145 Long-term debt 150 165 Stockholders’ equity 345 365 Total liabilities and equity $ 620 $ 675 a. What is the change in cash during 2021? b. Determine the change in net working capital in 2021. c. Determine the cash flow generated by the firm’s assets during 2021.