Astock price is currently $100. over each of the next two six-month periods it is expected to go up by 10% or down by 10%. the risk-free interest rate is 8% per annum with continuous compounding. what is the value of a one-year european call option with a strike price of $100?

calculate the price of a three-month european put option on a non-dividend-paying stock with a strike price of $50 when the current stock price is $50, the risk-free interest rate is 10% per annum, and the volatility is 30% per annum.