"A European call option on a share of Bestoptions Corp. is selling for $2. The option expires in 6 months and the exercise price is $31. The stock price is $29 and the risk-free rate is 4% compounded semiannually. The stock does not pay dividends. Find the value of the put option on the same stock, if its exercise price is $31 and the put expires in 6 months."