XYZ stock is currently traded at $40. Consider a put option on XYZ with $38 exercise price expiring in 6 months. Estimate the price of the option using two-period BOPM. Assume the stock price can go up by 10% and down by 15% each period (i.e., (6 months) / (2 periods) = 3 months). The annual risk-free interest rate is 6%.

please use excel and show formulas. thanks!