o Chris has a nal exam tomorrow. He still needs to focus on the nal chapters of the book to get the full grade in order to be ranked rst in the class. On the other hand, he has been invited to his intimate friend's goodbye party which is tonight. 0 Chris has a Toyota Camry, the engine of which needs to be repaired. He has to spend 1000'5 to repair it. On the other hand, the repairman offers him that he likes Chris's broken ear and wants to pay 4000$ to buy it in this condition. However, Chris can sell the repaired car at the price of 4900$ in a wellorganized market through a condential broker company which assures him that his check will be cashed immediately