From this balance sheet can you please calculate

1. Debt to total assets include the current year and prior year

2. Cash debt coverage include the current and prior year

3. Times interest earned the current and prior year

4. Free cash flow the current and prior year

Please SHOW ALL WORK AND HOW YOU GOT THE NUMBERS

Item 8. Financial Statements and Supplementary Data Southwest Airlines Co. Consolidated Balance Sheet (in millions, except share data) December 31,2017 December 31, 2016 ASSETS Current assets: Cash and cash equivalents Short-term investments Accounts and other receiv Inventories of parts and supplies, at cost Prepaid expenses and other current assets 1.778 1.625 420 460 4.815 337 310 4.498 Total current assets Property and equipment, at cost: 1,368 4.399 919 1.543 28.229 9.690 3,779 Ground property and equipment Deposits on flight equipment purchase contracts Assets constructed for others 1,220 9.420 17,044 970 774 23,286 Less allowance for depreciation and amortization Goodwill Oxher assets 970 786 25,110 S LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilit Accounts payable Accrued liabilities Air traffic liability Current maturities of long-term debt 1,320 S 1, 3.460 1,178 1,985 3.115 566 6,844 348 6,905 Total current liabilities Long-term debt less current maturities Deferred income taxes Construction obligation Other noncurrent liabilities Stockholders equity 3.320 58 1,390 2,821 374 1,078 Common stock, $1.00 par value: 2,000,000,000 shares authorized: 807,611,634 shares issued in 2017 and 2016 Capital in excess of par value Retained earnings Accumulated other comprehensive income (loss) Treasury stock, at cost: 219,060,856 and 192,450,855 shares 808 1,451 808 1.410 1,418 12 (323) in 2017 and 2016 respectively Total stockholders' equity (6,462) 10,430 25,110 $ (4,872) 8.441 23,286 Item 8. Financial Statements and Supplementary Data Southwest Airlines Co. Consolidated Balance Sheet (in millions, except share data) December 31,2017 December 31, 2016 ASSETS Current assets: Cash and cash equivalents Short-term investments Accounts and other receiv Inventories of parts and supplies, at cost Prepaid expenses and other current assets 1.778 1.625 420 460 4.815 337 310 4.498 Total current assets Property and equipment, at cost: 1,368 4.399 919 1.543 28.229 9.690 3,779 Ground property and equipment Deposits on flight equipment purchase contracts Assets constructed for others 1,220 9.420 17,044 970 774 23,286 Less allowance for depreciation and amortization Goodwill Oxher assets 970 786 25,110 S LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilit Accounts payable Accrued liabilities Air traffic liability Current maturities of long-term debt 1,320 S 1, 3.460 1,178 1,985 3.115 566 6,844 348 6,905 Total current liabilities Long-term debt less current maturities Deferred income taxes Construction obligation Other noncurrent liabilities Stockholders equity 3.320 58 1,390 2,821 374 1,078 Common stock, $1.00 par value: 2,000,000,000 shares authorized: 807,611,634 shares issued in 2017 and 2016 Capital in excess of par value Retained earnings Accumulated other comprehensive income (loss) Treasury stock, at cost: 219,060,856 and 192,450,855 shares 808 1,451 808 1.410 1,418 12 (323) in 2017 and 2016 respectively Total stockholders' equity (6,462) 10,430 25,110 $ (4,872) 8.441 23,286