SOLVE 7.3 Please.

Exercise 7.2 The prices of a certain security follow a geometric Brownian motion with parameters u = .12 and o = .24. If the security's price is presently 40, what is the probability that a call option, having four months until its expiration time and with a strike price of K = 42, will be exercised? (A security whose price at the time of expiration of a call option is above the strike price is said to finish in the money.) Exercise 7.3 If the interest rate is 8%, what is the risk-neutral valuation of the call option specified in Exercise 7.2