问：Explain why a gap call option is a regular call option plus a binary option when K2 > K1, using the same notation as in the chapter。答：Consider a gap option where the trigger price is K2 and the strike price for determining payoffs is K1. The gap call option is a plain vanilla option with strike price K2 plus a cash-or-nothing binary option that pays off K2 - K1 if the asset price is above K2.
1、老师您看我画的图理解的对吗？同时：1的payoff=K2-K1，2的payoff=St-K2，3的paoff=St-K1
3的payoff正好等于1的paoff+2的paoff。
2、以下是您在解答其他同学问题画的图，是不是不用管横轴下面的部分？
