A put option that expires in eight months with an exercise price of $46 sells for $4.15. The stock is currently priced at $49, and the risk-free rate is 3.4 percent per year, compounded continuously. What is the price of a call option with the same exercise price?

A put option and a call option with an exercise price of $60 and four months to expiration sell for $3.39 and $4.89, respectively. If the risk-free rate is 5 percent per year, compounded continuously, what is the current stock price?