help!! chapter 8 continued

10. (1 point) What can we say about the economic profit of a firm producing at the minimum point of its AV curve, where price (P) is exactly equal to average total cost (ATC)? 11 (1 point) Suppose a perfectly competitive market has a demand change and firms are now making economic profits a. Will firms begin to enter or exit that market? (Pick one) b. As a result of the entry or exit from part a., what will happen to the market supply curve