You are a senior marketing executive at Wal Mart. The board of directors has called you in to lead a team to fight back against the two biggest threats to the company's position as the worlds largest retailer. Sales have been eroding at the top economic end due to Amazon and other on line purveyors. At the bottom end, the Dollar Stores are eating in to shares as well reaching people who actually find walmart too expensive for their struggling pocketbooks. What suggestions do you have to fight back so Wal*Mart can hold its own?