The capital tour company offers five day tours of Ottawa for groups of students. Some of the company’s costs per student go down as the number of students increases. Other costs go up because of room rentals, meals, and the number of vans that are needed. To determine the profit per student, P dollars, the company uses the function p= -0.6n^2 + 36n - 440, where n represents the number of students taking the tour. Determine the least and greatest numbers of students that should be accepted in order for the tour company to make a profit.