The price of a European call option on a non-dividend-paying…

The price of a European call option on a non-dividend-paying stock with a strike price of $70 is $8. The stock price is $71, the continuously compounded risk-free rate (all maturities) is 4% and the time to maturity is one year. What is the price of a one-year European put option on the stock with a strike price of $70?