Problem 4: Reading a Balance Sheet Amazon.com, Inc. is the powerful online retailer that revolutionized shopping and has now moved into cloud computing services (Amazon Web Services). Its balance sheets as of December 31, 2020, and December 31, 2021, (reading left to right) appear in the exhibit below as the basis for the following questions. (Note that the company reports in millions of U.S. dollars.) Required: a. b. C. d. e. What is Amazon's largest asset? Calculate the current ratio (Current assets / Current liabilities) as of December 31, 2020, and December 31, 2021. Why might this ratio be helpful? What might be the explanation for the company's operating leases" asset? What is Amazon's largest long-term liability as of December 31, 2021? Calculate the total liabilities as of December 31, 2021. f. Was Amazon profitable during 2021? How can you tell from the balance sheets?