Visit EDGAR on the SEC website to obtain access to the Form 10-K filings for Walmart (WMT). You will find that Walmart has a January 31 fiscal year end. Find the 10-K filing for the period ended 1-31-2020. Item 6 contains a five-year financial summary in which you should extract the net sales and operating income amounts for 2016 through 2020. Use this information to prepare an Excel worksheet to answer the following questions. a. Calculate the net profit margin for each year. b. Calculate the compound average annual growth rates (CAGR) for revenue and net income using the geomean function. Is net income growing more slowly or faster than total revenue? Is this a