Can you explain how to solve this? And why the answer is B.

Problem 11.28. Describe the trading position (payoff) created in which a call option is bought with strike price K2 (take K2 = $35) and a put option is sold with strike price K, (take K7 = $35) when both have the same time to maturity. In general K> > K1. (a) What is the payoff position equation between $25 and $35? (b) What is the payoff equation for St> $35? (c) What is the payoff equation for Sr