(Problems 11-13) Consider the following balance sheet and the income statement in the next page: 11. What is the change of Caterpillar's net working capital between 2018 and 2019? (4 points) 12. (Continued) What is Caterpillar's operating margin in 2019? (4 points) 13. (Continued) What is Caterpillar's return on assets in 2019? (4 points) Breakdown 12/31/2019 12/31/2018 Assets Current Assets Cash Total Cash 11,376,000 Net Receivables 5,957,000 11,553,000 7,051,000 5,957,000 Inventory 5,379,000 Total Current Assets 1187,000 1,243,000 Non-current assets 2,155.000 1.919,000 Property, plant and equip... 26,621,000 28,218,000 Balance Sheet, Caterpillar Incorporation 12/31/2019 12/31/2018 Breakdown Liabilities and stockholders e- Liabilities Current Liabilities 8,284,000 7,857,000 Total Revenue 17,904,000 17,452.000 Accounts Payable 11,266,000 11,529,000 Accrued liabilities 39,193,000 38,603,000 Deferred revenues Other Current Liabilities Total Current Liabilities 29,217,000 29,781,000 Non-current liabilities -16,313,000 -16,207.000 Long Term Debt 12,904,000 13.574,000 Other long-term liabilities 6,196,000 6,217,000 Total non-current liabilities 1.565,000 1,897,000 Total Liabilities 3.340,000 2,332,000 Stockholders' Equity 39,260,000 39,906,000 Common Stock 78,453,000 78,509,000 Retained Earnings Accumulated other comprehe... Total stockholders' equity Total liabilities and stockholde.. Gross property, plant and e. 26,153,000 Accumulated Depreciation Net property, plant and e... Goodwill 24,544,000 3,756,000 4,323,000 37,203,000 36,211,000 Intangible Assets 63,824,000 64,429,000 Other long-term assets Total non-current assets 5.935,000 5,827,000 30,427,000 Total Assets 34,437,000 -1,567,000 -1,684,000 14,588 000 14,039,000 78,453,000 78,509,000 Income Statements, Caterpillar Incorporation Breakdown 12/31/2019 12/31/2018 Total Revenue 53.800.000 54.722,000 Cost of Revenue 37,384,000 37,719,000 Gross Profit 16,416,000 17,003,000 1.693.000 Operating Expenses Research Development Selling General and Administrati Total Operating Expenses Operating Income or Loss 1,850,000 5,478,000 5,162,000 8,126,000 8,710,000 8.290,000 8,293,000 421,000 404,000 Interest Expense Total Other Income/Expenses Net -57,000 -67,000 Income Before Tax 7,812,000 7,822,000 1,746,000 1698,000 Income Tax Expense Income from Continuing Operations Net Income 6,094,000 6,148,000 6,093,000 6,147,000