need explanation

1. If there are 50 identical firms, each with the same Firm's supply curve as represented in the diagram below, then the correct market supply curve is: A) SA B) SB C) So D) SD E) SE Market Price Individual Firm Price..... .. ... .. Firm's supply 80 curve 60 60 . . . . . . . ..... .. .. .. 40 40 Z.. ........ 2. . .. . -1. . . .;. . . 20 20 -. ..: 2 4 6 8 quantity 200 400 600 800 1000 Quantity 2. Sugar and Molasses are compliments in production. What is the impact of an increase in the price of Sugar on the market for Molasses? A) The equilibrium price will increase, and the equilibrium quantity will decrease. B) The equilibrium price will decrease, and the equilibrium quantity will increase. C) Both the equilibrium price and the equilibrium quantity will decrease. D) Both the equilibrium price and the equilibrium quantity will increase. E) None of the above. 3. If the demand curve for good A increases and supply increases, then the equilibrium. A) quantity decreases, but price may either increase, decrease, or remain unchanged. B) price increases, but quantity may either increase, decrease, or remain unchanged. C) quantity increases, but price may either increase, decrease, or remain unchanged. D) price decreases, but quantity may either increase, decrease, or remain unchanged. 4. Which of the following will not increase the supply of corn? A) A decrease in the price of an input used in the production of corn B) Good weather for growing corn C) An increase in the number of firms producing corn D) An increase in the price of com E) A decrease in the price of cotton (cotton and corn are substitutes in production) 5. If Marginal Cost is more than Marginal benefit at the last unit exchanged in the market, we can conclude? A) Too little of this good is being produced. B) We are maximizing net benefits to society. C) Too much of this good is being produced. D) We are minimizing net benefits to society. 6. Suppose that the equilibrium price of good X has decreased and the equilibrium quantity of good X has increased. What is the likely cause of this change? A) demand for good X has decreased. B) supply for good X has decreased. C) demand for good X has increased. D) supply for good X has increased