Balance Sheets as of December 31 Liabilities and Equity Income Statement for Year Ending December 31, 2021 Enter your answers in millions. For example, an answer of $25,000,000,000 should be entered as 25,000 . Round your answers to the nearest whole number, if necessary. a. What was net operating working capital for 2020 and 2021 ? Assume that all cash is excess cash; i.e., this cash is not needed for operating purposes. 2020$ million million