You observe a premium of $$5\mathrm{.}38$ for a call option on Birdwell Enterprises common stock, which is currently selling for $$38.$ The strike

price on the call option is $$35.$ The option has four months to maturity. The stock pays no dividends. The current risk$-$free interest rate

is $4\mathrm{.}50\%.$ What is the implied volatility of the stock?

Note: Round your answer to the nearest whole percent.