please help find the right answer

Problem 21-38 You are attempting to value a put option with an exercise price of $108 and one year to expiration. The underlying stock pays no dividends, its current price is $108, and you believe it has a 50% chance of increasing to $130 and a 50% chance of decreasing to $86. The risk-free rate of interest is 5%. Calculate the value of a put option with exercise price $108. (Do not round intermediate calculations. Round your answer to 2 decimal places.) X Answer is complete but not entirely correct. Value of a put option $ 10.48