Answer:
The socially optimal outcome is that there will be no smoking in the room.
Explanation:
The above answer is based on the willingness of the nonsmoker to ensure that no smoking happens in the room. For instance, the nonsmoker can pay off the smoker, paying $600 to dissuade him from smoking in the room. On the contrary, the smoker is only willing to cough out $500, which is less than $600, in order to smoke in the room. Under social optimality, the nonsmoker wins this game.
