A Eurоpeаn cаll оptiоn on а non‑dividend‑paying stock is currently trading in the market for $6.49. The option has: Spot price: $60 Strike price: $70 Time to expiration: 252 trading days (assume 252 trading days per year) Risk‑free interest rate: 4.5% (continuously compounded) Using the BSOPM, determine the volatility implied by the market price of the option. Enter your answer as a percentage, rounded to the nearest 0.01% (For example, for 0.12345, 12.35)