Market demand is given by: P=a-bQ  The total cost function for firm 1 is:  TC1=4q1 and the total cost function for firm 2 is: TC2=6q2

a) Find the Cournot-Nash duopoly equilibrium price, quantities and profits. (4 points)

b) Suppose firm 1 observes firm 2’s output before choosing its own output. Find the Stackelberg equilibrium price, quantities and profits. (4 points)

c) Suppose a third firm enters the market with the same cost structure as firm 1, and that both firm 1 and firm 3 observe firm 2’s output before simultaneously choosing their own output. Find the equilibrium price, quantities and profits. (4 points)

d) Determine the price, quantities and profits if these three firms behaved as a cartel. Describe if the cartel is stable for all players relative to part c. (3 points)

我不会啊不会　要做CARTEL　不是应该俩公司的MC相等么？　现在他俩一个４一个６

怎么相等啊？　还有CARTEL　BEHAVE LIKE A MONOPOLY对吧　那就说俩公司的产量应该是各自为垄断厂商的产量～？？

我混乱　我崩溃啊～　大家帮帮我啊～～～～～～