Describing Wal-Mart's strategy

1) Conduct a brief Porter Five Forces analysis of the industry (limit yourselves to 3 - 4 bullet points per element). How would you describe the dynamics of the industry? 2) How would you describe Wal-Mart's strategy? What are the key specific actions Wal-Mart has taken to execute its strategy over time? How has this led to their success? 3) Describe Wal-Mart's business from a Value Chain perspective. What elements has Wal-Mart focused on and how has this created value? 4) What do you see as Wal-Mart's three main challenges going forward? Briefly, how would you address these challenges??