Required: You observe a premium of $3.08 for a call option on Birdwell Enterprises common stock, which is currently selling for $49. The strike price on the call option is $50. The option has four months to maturity. The stock pays no dividends. The current risk-free interest rate is 2.0%. What is the implied volatility of the stock? (Do not round your intermediate calculations and round your final answer to the nearest whole percent.) Implied volatility