Need help with these financial ratios! The company in question is American Airlines. Please use 10K statements for American Airlines to solve these ratios! Thank you!

- The American airlines ability to generate cash flows and if this ability is stable? (2019, 2018, 2017)

- The quality of Companys tangible assets (type of the tangible assets, and average age of the tangible assets) [Remember: average age of the assets is the total accumulated depreciation divided by annual depreciation expense. Total accumulated depreciation is the original cost of the depreciable assets minus the net carrying value of the depreciable assets.]

- The Airlines' solvency ratio (2019, 2018, 2017)

2019 2018 2016 2017 (in millions, except share and per share amounts) $ $ $ $ 45,768 42,703 3,065 1,686 44,541 41,885 2,656 1,412 42,622 38,391 4,231 1,282 40,142 35,082 5,060 2,584 Consolidated Statements of Operations data: Total operating revenues Total operating expenses Operating income Net income Earnings per common share: Basic Diluted Shares used for computation in thousands): Basic Diluted Cash dividends declared per common share $ $ $ $ 3.80 3.79 3.04 3.03 2.62 2.61 4.68 4.65 443,363 444,269 0.40 464,236 465,660 0.40 489,164 491,692 0.40 552,308 556,099 0.40 $ $ $ $ $ $ $ $ Consolidated Balance Sheet data (at end of period): Total assets Debt and finance leases Pension and postretirement obligations (1) Operating lease liabilities Stockholders' equity (deficit) 59,995 24,315 6,081 9,129 (118) 60,580 24,473 6,937 9,556 (169) 52,785 25,065 7,596 53,610 24,344 7,946 (780) (286) 2019 2018 2016 2017 (in millions, except share and per share amounts) $ $ $ $ 45,768 42,703 3,065 1,686 44,541 41,885 2,656 1,412 42,622 38,391 4,231 1,282 40,142 35,082 5,060 2,584 Consolidated Statements of Operations data: Total operating revenues Total operating expenses Operating income Net income Earnings per common share: Basic Diluted Shares used for computation in thousands): Basic Diluted Cash dividends declared per common share $ $ $ $ 3.80 3.79 3.04 3.03 2.62 2.61 4.68 4.65 443,363 444,269 0.40 464,236 465,660 0.40 489,164 491,692 0.40 552,308 556,099 0.40 $ $ $ $ $ $ $ $ Consolidated Balance Sheet data (at end of period): Total assets Debt and finance leases Pension and postretirement obligations (1) Operating lease liabilities Stockholders' equity (deficit) 59,995 24,315 6,081 9,129 (118) 60,580 24,473 6,937 9,556 (169) 52,785 25,065 7,596 53,610 24,344 7,946 (780) (286)