Question 3: Please answer all parts

Required: You buy a share of stock, write a one-year call option with X=$11, and buy a one-year put option with X=$11. Your net outlay to establish the entire portfolio is $10.50. What is the payoff of your portfolio? What must be the risk-free interest rate? The stock pays no dividends. (Do not round intermediate calculations. Round "risk-free rate" to 2 decimal places.)