In the Same Football Conference as the University in Problem

In the same football conference as the university in Problem 9 is another university where the demand for football tickets at each game is 80,000 - 4,000p. If the capacity of the stadium at that university is 50,000 seats, what is the revenue-maximizing price for this university to charge per ticket?

A) $10
B) $5
C) $7.50
D) $20
E) $30