(Black–Scholes and put–call parity) A put option with 1 year to maturity is written on a stock. The current underlying stock price is $20. The option’s exercise price is $18, the interest rate is 3.74%, and the stock’s volatility is 32.7%. The price of a call option written on the same stock with the same exercise price and time to maturity is $4.3. Use Black–Scholes model to determine: Does put–call parity hold?