Answer
(a) This could go either way but most likely ticket sales will decrease.
(b) Ticket sales will likely decrease.
(c) Ticket sales will definitely decrease.
Work Step by Step
(a) This could go in two ways - either people would prefer to see a more interesting game and they would come more, or they would be discouraged from coming due to the higher probability of GSU losing. The latter is more probable.
(b) If an NBA team locates to the city where GSU plays, more people will go to the NBA games, causing less to come to GSU games.
(c) If games are televised, many more people would prefer to watch them at home for free rather than paying to see the game live.