Answer:
1) You should go home and watch TV.
Explanation:
Since you value seeing the play $10, then you should leave the theater and go to your house to watch TV since that has a higher value for you ($12).
We are talking about opportunity costs here. Opportunity costs are the extra costs or benefits lost from choosing one activity or investment over another. In this case the opportunity costs are:
Since watching TV is more valuable to you, then that is what you should be doing.