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

WIPER INC.
Condensed Balance Sheets
December 31, 2020, 2019, 2018
(in millions)
	2020			2019			2018
Current assets	$	734		$	959		$	813
Other assets		2,421			1,928			1,727
Total assets	$	3,155		$	2,887		$	2,540
Current liabilities	$	585		$	838		$	731
Long-term liabilities		1,555			1,015			883
Stockholders equity		1,015			1,034			926
Total liabilities and stockholders' equity	$	3,155		$	2,887		$	2,540

WIPER INC.
Selected Income Statement and Other Data
For the year Ended December 31, 2020 and 2019
(in millions)
	2020			2019
Income statement data:
Sales	$	3,058		$	2,921
Operating income		304			318
Interest expense		92			73
Net income		215			210
Other data:
Average number of common shares outstanding		42.1			47.5
Total dividends paid	$	58.0		$	53.1

1. Calculate Wiper's debt ratio and debt/equity ratio at December 31, 2020 and 2019.
2. Calculate the times interest earned ratio for 2020 and 2019.