An investor subscribes to a call option with a strike price of 20USD. In May, the shares cost 18USD, and the option price is 2USD. Describe the investor's cash flow, if the option is retained until...

An investor subscribes to a call option with a strike price of 20USD. In May, the shares cost 18USD, and the option price is 2USD. Describe the investor's cash flow, if the option is retained until September and the stock price is 25USD on that date.