Use the Black-Scholes-Merton model to value a European call option on the spot price of a share when the strike price is $40, and the expiration is in 6 months. The current price of share is $45. The risk-free rate is 5% per annum and the volatility is 30%. Use normal distribution tables at the end of the textbook to calculate the final put price. Please show all formulae and calculations.