What is marginal cost (MC) equal to at the best possible rate of output? $ Is average total cost (ATC) above, below, or equal to price, p1? (Click to select) Identify if the following would raise, lower, or not change the market price. A reduction in all firms' output would (Click to select) the market price. An increase in input costs for all firms would (Click to select) the market price. Exit of firms from the industry would (Click to select) the market price. An improvement in technology to grow catfish would (Click to select) the market price. What price would prevail in long-run equilibrium? $