1.(1) not easy to draw a tree here.
(2) 做广告 不做广告
做广告 4, 4 10, 2
不做广告 2, 10 8,8
(3) (4) (做广告, 做广告)
(5) (做,做) (做,不做) (不做,做) (不做,不做)
(做,做) 8,8 14,6 14,6 20,4
(做,不做) 6,14 12,12 12,12 18,10
(不做,做) 6,14 12,12 12,12 18,10
(不做,不做) 4,20 10,18 10,18 16,16
draw the extensive form by yourself, make sure the information sets are right.
2. What does 最优反应曲线 mean here?