AMAZON and Walmart companies in the same industry and analyze their latest XBRL 10-K documents on the SEC's EDGAR website. Answer the following questions: - (1) List FIVE us-gaap elements that are used by BOTH companies. - (2) List FIVE us-gaap elements that are used by each company ONLY. - (3) List company extension elements (i.e., custom elements) that you believe are appropriately used by the company (i.e., there is no equivalent element in the US GAAP Financial Reporting Taxonomy) - (4) List company extension elements that you believe the company created inappropriately (i.e., there is a potentially equivalent element in the US GAAP Financial Reporting Taxonomy. Provide the reason why you believe the potentially equivalent element in the US GAAP Financial Reporting Taxonomy could have been used instead