Ritter Corporation's accountants prepared the following financial statements for year-end 2019: (Do not round Intermediate calculations.) RITTER CORPORATION Income Statement 2019 Revenue $930 Expenses 655 Depreciation 108 Net income $ 167 $ 147 Dividends RITTER CORPORATION Balance Sheets December 31 2018 2019 Assets Cash $ 73 $ 101 Other current assets Net fixed assets 388408 Total assets $644 $ 715 183 206 $ 133 Liabilities and Equity Accounts payable Long-term debt Stockholders' equity 158 $ 161 181 373 353 Total liabilities and equity $644 $ 715 a. What is the change in cash during 2019? b. Determine the change in net working capital in 2019. c. Determine the cash flow generated by the firm's assets during 2019