3- A-In "Why Producers Produce?" we assumed they are "rational." Explain what it means, and how we defined it to fit small business. Why did we want it to fit small business? (10 points) B. What is "opportunity cost (economists' concept of cost)? How is it different from business concept? What is it good (used) for? (10 points) C-What is "economic profit" (Total Profit)? What is it good (used) for? What if economic profit is negative? What will happen to this market? (10 points)