Presented here are summarized data from the balance sheets and income statements of Wiper, Inc.:

WIPER, INC.
Condensed Balance Sheets
December 31, 2017, 2016, 2015
(in millions)
	2017			2016			2015
Current assets	$	707		$	939		$	793
Other assets		2,419			1,926			1,725
Total assets	$	3,126		$	2,865		$	2,518
Current liabilities	$	583		$	836		$	724
Long-term liabilities		1,530			997			870
Stockholders equity		1,013			1,032			924
Total liabilities and stockholders' equity	$	3,126		$	2,865		$	2,518

WIPER, INC
Selected Income Statement and Other Data
For the year Ended December 31, 2017 and 2016
(in millions)
	2017			2016
Income statement data:
Sales	$	3,056		$	2,919
Operating income		302			316
Interest expense		90			71
Net income		209			204
Other data:
Average number of common shares outstanding		41.9			47.3
Total dividends paid	$	56.0		$	52.9

Required:

a. Calculate return on investment, based on net income and average total assets, for 2017 and 2016. (Do not round intermediate calculations. Round your answers to 1 decimal place.)

b. Calculate return on equity for 2017 and 2016. (Round your answers to 1 decimal place.)

c. Calculate working capital and the current ratio for each of the past three years. (Enter your answers in millions (i.e., 5,000,000 should be entered as 5). Round "Current ratio" to 1 decimal place.)

d. Calculate earnings per share for 2017 and 2016. (Round your answers to 2 decimal places.)

i. Calculate Wiper's debt ratio and debt/equity ratio at December 31, 2017 and 2016. (Round "Debt ratio" to 1 decimal place and "Debt/equity ratio" to the nearest whole percent.)