a) Over the past five years, a stock returned 8.3 percent, -32.5 percent, -2.2 percent, 46.9 percent, and 11.8 percent, respectively. What is the variance of these returns?
b) Over the past six years, a stock had annual returns of 14 percent, -3 percent, 8 percent, 21 percent, -16 percent, and 4 percent, respectively. What is the standard deviation of these returns?
c) The stock of Wiley United has a beta of 0.92. The market risk premium is 8.6 percent and the risk-free rate is 3.2 percent. What is the expected return on this stock?