A. A stock had returns of 9 percent, 3 percent, 4 percent, and 15 percent over the past four years. What is the standard deviation of this stock for the past four years?

a. 5.4 percent

b. 5.9 percent

c. 6.3 percent

d. 6.6 percent

e. 7.6 percent

B. Milner's stock had annual returns of 11.4 percent, 2.6 percent, and 14.8 percent over the past three years. Which one of the following best describes the probability that this stock will produce a return of 25 percent or more next year? (assume the return follows normal distribution)

a. less than 0.1 percent

b. less than 0.5 percent

c. less than 1.0 percent

d. less than 2.5 percent

e. less than 5 percent

C. A stock has an expected rate of return of 7.9 percent and a standard deviation of 6.2 percent. Which one of the following best describes the probability that this stock will lose more than 4.5 percent in any one given year? (assume the return follows normal distribution)

a. less than 0.5 percent

b. less than 1.0 percent

c. less than 1.5 percent

d. less than 2.5 percent

e. less than 5 percent