A stock is currently selling for $61 per share. A call option with an exercise price of $68 sells for $4.15 and expires in four months. If the risk-free rate of interest is 2.7 percent per year, compounded continuously, what is the price of a put option with the same exercise price? a. $11.09 b. $10.96 c. $10.12 d. $2.04 e. $10.54