(Computing the expected rate of return and risk) After a tumultuous period in the stock market, Logan Morgan is considering an investment in one of two portfolios. Given the information that follows, which investment is better, based on risk (as measured by the standard deviation) and return as measured by the expected rate of return?

a. What is the expected rate of return and standard deviation for portfolio A?

b. What is the expected rate of return and standard deviation for portfolio B?

c. Based on the risk (as measured by the standard deviation) and return as measured by the expected rate of return of each stock, which investment is better?

Portfolio A Portfolio B Return Probability 0.15 0.57 0.28 Return - 3% 20% 26% Probability 0.12 0.25 0.42 0.21 3% 10% 13% 15%