9. Calculating Returns and Variability Youve observed the following returns on Yasmin Corporations stock over the past five years: 19 percent, 13 percent, 7 percent, 25 percent, and 16 percent. a. What was the arithmetic average return on the companys stock over this five-year period? b. What was the variance of the companys stock returns over this period? The standard deviation?

10. Calculating Real Returns and Risk Premiums In Problem 9, suppose the average inflation rate over this period was 2.6 percent and the average T-bill rate over the period was 3.25 percent. a. What was the average real return on the companys stock? b. What was the average nominal risk premium on the companys stock?