According to Delta House Publishing, the demand for horror novel access is given by q = -1000p + 128000 copies per year, where p is the price per access to one horror novel in dollars. The supply is given by q = 2000p copies per year. a. What price should Delta House charge so that supply and demand are in equilibrium (that is, supply and demand are equal)? b. What is the quantity they would supply at that price?