Study the Consolidated Statements of Shareholders' Equity. Several factors are responsible for the changes in the shareholders equity between 2016 and 2015. How many classes of stock does Wal-Mart have? What are they? Did the number of shares of that stock increase or decrease during the year 2016? Did the company pay a cash dividend during the year? If so, how much per share? Please discuss those elements, writing a paragraph of at least 50 words, explaining where you can find the details of these answers.