A stock will provide a rate of return of either 23% or 34%. a. If both possibilities are equally likely, calculate the stock's expected return and standard deviation. (Do not round intermediate calculations. Enter your answers as a percent rounded to 1 decimal place.) Expected return 5.5 % Standard deviation 16.0 % b. If Treasury bills yield 5.5% and investors believe that the stock offers a satisfactory expected return, what must the market risk of the stock be? (Enter your answer as a whole percent.) Market risk %