This show is a public good because 1) no one can be excluded and 2) when one person watches it does not diminish another person’s ability to watch. 

This show is a non-rival private good because 1) nonpayers can be excluded and 2) when one person watches it does not diminish another person’s ability to watch. 

This show is a public good because payers and nonpayers alike are watching a rival show. 

This show is a common good because 1) nonpayers can be excluded and 2) when one person watches it does not diminish another person’s ability to watch.