A local Barnes and Noble store has the following demand function for its textbooks:

Q = 10,000 - 5,000P + 0.02Pop + 0.4I + 0.6A

Where Q is the quantity, P is the price, Pop is the population, I is the disposable income per capita, and A is the advertising expenditures.

1. Determine the demand curve faced by the bookstore in a typical market where Pop = 500,000 person, I = $25,000 and A = $10,000. Show the demand curve with price expressed as a function of quantity.
2. Calculate the prices necessary for the buyers to buy 10,000 units.