Six years ago, you purchased 250 shares of common stock for $53.87 per share. Since that time, the annual returns were 10.1%, 9.5%, 5.5%, 3.1%, (4.4%), and (8.9%). Based on these annual returns, calculate the stocks standard deviation and the range of returns within which youd expect the annual return to be within 95% of the time. Select one: a. (12.84%) to 17.81% b. (15.25%) to 21.08% c. (8.37%) to 15.93% d. (14.66%) to 20.33% e. (5.94%) to 12.87%.