The price of a non-dividend paying stock is currently $56, and its volatility is 30%. The risk-free rate is 6% per annum (continuously compounded) for all maturities. Calculate the values of u, d and p when a 4-month time step is used. What is the value of a 4-month European call option with a strike price of $58? And what is the value of a 4-month European put option with a strike price of $54? Show calculations