18) (6 pts) Consider der a six-month European put option on a stock with a strike price of $31. The period binomial tree. The risk-free interest rate is 2% per year. The stock pays Eur current stock price is $30 and over the next six months it is expected to rise to $33 or fall to $27 in a one- no dividend. What is the price of the put option? If you sold this put position in the underlying stock is needed to hedge this short put and how much money would you borrow or lend to complete the hedging position? What is the price of a call option with the same strike and expiration time? Please use your calculated put and call prices to verify that put-call parity holds. option, what exact