1) We sell a put option with strike price of 120 (K2) with a premium is 10 dollars. At the same time, we buy a put option with a strike price of 110 (K1) with a premium of 7 dollars. Both put options expire in three months. On the expiration day, it the stock price is 105, what is the gain or loss?

2) We sell a call option with strike price of 200 (K1) with a premium is 13 dollars. At the same time, we buy a call option with a strike price of 220 (K2) with a premium of 3 dollars. Both call options expire in three months. On the expiration day, it the stock price is 210, what is the gain or loss?

3) We sell a call option with strike price of 100 (K1) with a premium is 5 dollars. At the same time, we buy a call option with a strike price of 110 (K2) with a premium of 2 dollars. Both call options expire in three months. On the expiration day, it the stock price is 120, what is the gain or loss?

4) We buy a call option with strike price of 70 (K1) with a premium of 6 dollars. At the same time, we sell a call option with a strike price of 85 (K2) with a premium of 3 dollars. On expiration day, the stock price is 65, what is the gain or loss?