(Related to Checkpoint 18.1) (Measuring firm liquidity) The following table contains current asset and current liability balances for Deere and Company (DE): a. Measure the liquidity of Deere \& Co. for each year using the company's net working capital and current ratio. b. Is the trend in Deere's liquidity improving over this period? a. The company's net working capital for 2011 is $ (Enter your answer in thousands of dollars.) Data table (Click on the icon in order to copy its contents into a spreadsheet.)