The returns on a portfolio during the last three years were 4 percent, -15 percent, and 12.5 percent. What is the standard deviation of these returns? Multiple Choice 14.08% 4.75% 38.74% 11.50% 1.98% The average annual return on small-company stocks was about percentage points greater than the average annual return on large-company stocks during the period from 1926 to 2020. Multiple Choice 7 3 5 6 O. 4