a. Use the Black-Scholes formula to find the value of a European put option on the following stock:
Time to Maturity: 12 months
Standard Deviation: 25% per year
Exercise Price: $40
Current Stock Price: $40
Interest rate: 4% per year
b. If the option in question were an American put option instead of a European put option, would it have a higher or lower price than the European put option? Why?.