You observe a premium of $46 for a call option on Birdwell Enterprises common stock, which is currently selling for $46. The strike price on the call option is $47. The option has 4 months to maturity. The stock pays no dividends. The current risk-free interest rate is 3.50%. What is the implied volatility of the stock?

Other chegg answers are hard to follow and use in my own excel. Thank you!