(a) Calculate the Black-Scholes prices of the European call and put options with six-month maturity if the current stock price is $20 and grows with average rate of m ¼ 10%, volatility is 20%, and risk-free interest rate is 5%. The strike price is: (1) $18; (2) $22.

(b) How will the results above change if m ¼ 5%?