1. You've observed the following returns on SkyNet Data Corporation's stock over the past five years: 21 percent, 17 percent, 26 percent, 27 percent, and 4 percent. a. What was the arithmetic average return on the company's stock over this five- year period? b. What was the standard deviation of the company's returns over this period? c. What was the average nominal risk premium on the company's stock if the average T-bill rate over the period was 5.1 percent