Ritter Corporation's accountants prepared the following financial statements for year-end 2021 (Do not round intermediate calculations.) RITTER CORPORATION Income Statement 2021 Revenue $930 Expenses 655 Depreciation 108 Net income $167 Dividends $147 RITTER CORPORATION Balance Sheet December 31 2020 2021 Assets Cash $73 %101 Other current assets 183 206 Net fixed assets 388 408 Total assets $644 $715 Liabilities and Equity Accounts payable $133 $161 Long-term debt 158 181 Stockholders' equity 353 373 Total liabilities and equity $644 $715 a. What is the change in cash during 20217 b. Determine the change in net working capital in 2021. c. Determine the cash flow generated by the firm''s assets during 2021