please solve the following questions

Questions How has the implementation of NAFTA affected Wal- Mart's success in Mexico? How much of Wal-Mart's success is due to NAFTA, and how much is due to Wal-Mart's inherent competitive strategy? In other words, could any other U.S. retailer have the same success in Mexico post- NAFTA, or is Wal-Mart a special case? What has Comerci done in its attempt to remain competitive? What are the advantages and challenges of such a strategy, and how effective do you think it will be? What else do you think Commercial Mexicana S.A. should do, given the competitive position of Wal-Mart