Keith Corporation Balance Sheets December 31 Assets 2018 2019 Cash S 1,000 1,200 $1,500 Marketable securities 1,800 Accounts receivable 1,800 2,000 2,800 Inventories 2,900 6,800 $ 8,200 Total current assets $28,100 $29,500 Gross fixed assets 13,100 14,700 Less: Accumulated depreciation $15,000 $14,800 Net fixed assets $21,800 $23,000 Total assets Keith Corporation Balance Sheets (continued) December 31 Liabilities and stockholders' equity 2018 2019 Accounts payable Notes payable s 1,500 S 1,600 2,200 2,800 Accruals 300 200 4,000 5,000 Total current liabilities S 4,600 Long-term debt 5,000 $ 9,000 Total liabilities $ 9,600 10,000 Common stock $10,000 2,800 3,400 Retained earnings Total stockholders' equity Total liabilities and stockholders' equity $13,400 $12,800 $23,000 $21,800 Keith Corporation Income Statement Data (2019) Depreciation expense $1,600 Earnings before interest and taxes (EBIT) Interest expense Net profits after taxes 2,700 367 1,400 Tax rate 21% a. Calculate the firm's net operating profit after taxes (NOPAT) for the year ended December 31, 2019, using Equation 4.1. b. Calculate the firm's operating cash flow (OCF) for the year ended December 31 2019, using Equation 4..3. c. Calculate the firm's free cash flow (FCF) for the year ended December 31,2019 using Equation 4.4. compare, and contrast your cash flow estimates in parts b and c. d. Interpret