5. The volatility of a non-dividend-paying stoek whose price is 80 , is 25%. The risk-free rate is 5% per annum(continuously compounded) for all maturities. Calculate values for u,d, and p when a two-month time step is used. What is the value of a 6-monthEuropean call option with a strike price of 80 given by a two-step binomial tree. Suppose a trader sells 2,500 options (25 contracts). What position in the stock is necessary to hedge the trader's position at the time of the trade