Suppose you are selling a new guidebook. You happen to know that the short-run demand curve for your specific guidebook--for which you have a monopoly in the short-run---is Q = 10 - P. Your MC for producing an additional unit of the book is 2. What price should you set for the book if your goal is to maximize profits in the short-run? (Put just the number--no $ sign. Also, the answer should be a whole number. If you have a decimal you've gone wrong!)