($ Millions)	JetBlue Airways	Southwest Airlines
Total liabilities, 2017	$ 4,947	$ 13,973
Total current liabilities, 2017	$ 2,395	$ 6,905
Total liabilities, 2016	$ 5,310	$ 14,845
Total current liabilities, 2016	$ 2,214	$ 6,844
Total assets, 2017	$ 9,781	$ 25,110
Total current assets, 2017	$ 1,206	$ 4,815
Total assets, 2016	$ 9,323	$ 23,386
Total current assets, 2016	$ 1,403	$ 4,498
Revenue, 2017	$ 7,015	$ 21,171
Net income, 2017	$ 1,147	$ 3,488

(Please show work so I can learn how to do it)

c.) For each company, compute net income as a percentage of revenue in 2017.

d.) For each company, calculate working capital and current ratio for 2017 and 2016. How did they change from 2016 to 2017 (improve or worsen)? What may have caused those changes?