Ritter Corporations accountants prepared the following financial statements for year-end 2019: (Do not round intermediate calculations.)

RITTER CORPORATION
Income Statement
2019
Revenue	$	870
Expenses		625
Depreciation		102
Net income	$	143
Dividends	$	123

RITTER CORPORATION
Balance Sheets
December 31
		2018			2019
Assets
Cash	$	67		$	89
Other current assets		177			194
Net fixed assets		382			402
Total assets	$	626		$	685
Liabilities and Equity
Accounts payable	$	127		$	149
Long-term debt		152			169
Stockholders equity		347			367
Total liabilities and equity	$	626		$	685

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 firms assets during 2019.