Provide an example of a third party benefiting from a prisoner's dilemma outcome while the game participants are worse off relative to other possible...

 Provide an example of a third party benefiting from a prisoner's dilemma outcome while the game participants are worse off relative to other possible outcomes. Also, explain the nature of the benefit.

2. How can a repeated game help in resolving a prisoner's dilemma outcome?

3. Why is game theory important to economics?