Consider a European call option on IBM stock that matures in 2 months. The strike price is $25, the continuously compounded risk-free rate is 1%, and the current stock price of IBM is $25. Suppose IBM does not pay dividends in the following two months. Suppose the IBM stock price in two months follows a single-period binomial tree model, i.e., the total return of the stock in three months is either 1.1 or 1/1.1. Find the option price