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

RITTER CORPORATION
Income Statement
2019
Revenue	$	850
Expenses		615
Depreciation		100
Net income	$	135
Dividends	$	115

RITTER CORPORATION
Balance Sheets
December 31
		2018			2019
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 2019?

b.	Determine the change in net working capital in 2019.

c.	Determine the cash flow generated by the firms assets during 2019.