Activity measures: m. Calculate the accounts receivable turnover and number of days' sales in accounts receivable (based on a 365-day year) for the most recent year. Page 427 n. Based on your analysis in part m, do you believe that the company is doing an effective job at managing accounts receivable? What would you estimate the industry averages to be for the accounts receivable turnover and number of days sales in accounts receivable? Explain. o. Calculate the inventory turnover and number of days" sales in inventory (based on a 365-day year) for the most recent year P- Based on your analysis in part o, to what extent does the company need to be concerned about its inventory management policies? In assessing the inventory management policies, would you be more interested in knowing current ratio or acid-test ratio information? Explain. US$ in millions 12 months ended: Dec 31, 2021 Dec 31, 2020 Dec 31, 2019 Net income 33,364 21,331 11,588 Depreciation and amortization of property and equipment and capitalized content costs, operating lease assets, and other 34,296 25,251 21,789 Stock-based compensation Other operating (income) expense, net Other (income) expense, net Deferred income taxes Inventories Accounts receivable, net and other Accounts payable 12,757 9,208 6,864 137 (71) 164 (14,306) (2,582) (249) (310) (554) 796 (9,487) (2,849) (3,278) (18,163) (8,169) (7,681) 3,602 17,480 8,193 Accrued expenses and other 2,123 5,754 (1,383) Unearned revenue 2,314 1,265 1,711 Changes in operating assets and liabilities (19,611) 13,481 (2,438) Adjustments to reconcile net income to net cash from operating activities 12,963 44,733 26,926 Net cash provided by operating activities 46,327 66,064 38,514 Purchases of property and equipment (61,053) (40,140) (16,861) Proceeds from property and equipment sales and incentives 5,657 5,096 4,172 Acquisitions, net of cash acquired, and other (1,985) (2,325) (2,461) Sales and maturities of marketable securities Purchases of marketable securities Net cash used in investing activities Proceeds from short-term debt, and other Repayments of short-term debt, and other Proceeds from long-term debt Repayments of long-term debt 59,384 50,237 22,681 (60,157) (72,479) (31,812) (58,154) (59,611) (24,281) 7,956 6,796 1,402 (7,753) (6,177) (1,518) 19,003 10,525 871 (1,590) (1,553) (1,166) Principal repayments of finance leases (11,163) (10,642) (9,628) Principal repayments of financing obligations (162) (53) Net cash provided by (used in) financing activities 6,291 (1,104) (27) (10,066) Foreign currency effect on cash, cash equivalents, and restricted cash (364) 618 70 Net increase (decrease) in cash, cash equivalents, and restricted cash (5,900) 5,967 4,237