Fizer, Inc., reported the following financial statements for the last two years FIZER, INC. Balance Sheet as of December 31, 2019 FIZER, INC. Balance Sheet as of December 31, 2020 a. Calculate the operating cash flow. (Do not round intermediate calculations.) b. Calculate the change in net working capital. (Do not round intermediate calculations.) c. Calculate the net capital spending. (Do not round intermediate colculations.) d. Calculate the cash flow from assets. (Do not round intermediate calculations. A negative answer should be indicated by a minus sign.) e. Calculate the cash flow to creditors. (Do not round intermediate calculations.) f. Calculate the cash flow to stockholders. (Do not round intermediate calculations. A negative answer should be indicated by a minus sign.)