A university's students have demand for credit hours given by q = 30 - 0.04p, where p is the price per credit hour.
a. If the university charges only one price for credit hours irrespective of the number of credit hours a student enrolls for, identify the price per credit hour that would maximize revenue for the university.
b. If the university adopts a two-tier pricing structure, identify the structure that would maximize revenue for the university.