Answer:
a) see attached graph. There is nothing unusual with the supply curve, it is simply fixed. This happens to most services, e.g. there is a fixed number of hotel rooms available for rent, in the short run you cannot add more rooms per night if the demand increases. In order to increase the quantity supplied, you would need to build a larger hotel, or in this case, a larger stadium.
b) the equilibrium price is $8 and the equilibrium quantity is 8,000 tickets
c) if the college plans to increase enrollment, the demand might increase, leading to a higher equilibrium price, but the supply will remain the same until the stadium is expanded.
Explanation:
Price Quantity Demanded (Qd) Quantity Supplied (Qs)
$4 10,000 8,000
$8 8,000 8,000
$12 6,000 8,000
$16 4,000 8,000
$20 2,000 8,000