4. The stakes are high as you and your team negotiate a deal with a major supplier. A person who has driven hard bargains in the past and has shown himself to be unethical in conducting prior negotiations leads the supplier's team. The negotiations are ending after two days, but the parties are coming back for a third day in an attempt to reach an agreement. Tempers have flared on both days. When you leave the hotel confer- ence room where the negotiations have occurred, you are not convinced that there will be an agreement. As you are about to step into the elevator, you cannot find your phone. You tell your team to go to dinner, and you will meet them. You return to the conference room and look for your phone. Just after you find your phone in a chair, you look across the room and see that there is a file folder on another chair. You open the folder and discover it belongs to the supplier's team. More importantly, you discover it contains a detailed plan for negotiating with your firm. What should you do