Plot the rate of return to the call$-$plus$-$bill strategy using a diagram like that in Figure $15\mathrm{.}5$ but now assuming the investor uses an in$-$the$-$money call option with a strike price of $$80.$ Assume the calls sell for $$15.$ The higher cost for these calls compared to the at$-$the$-$money calls will result in less money being placed by T$-$bills because the investment budget is still $$9000.$ In excel