Youve observed the following returns on Pine Computers stock over the past five years: 17 percent, 15 percent, 19 percent, 29 percent, and 10 percent. Suppose the average inflation rate over this period was 2.6 percent and the average T-bill rate over the period was 4.3 percent. a. What was the average real return on the companys stock? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g.,