You've observed the following returns on Regina Computer's stock over the past five years 16-5%. 19% 8% and 10% What was the aritmetic average return on Regina's stock over this five year period (Round the final answer to 1 decimal place) Average return b-1 What was the variance of Heona s retures over this period? (Do not round intermediate calculation. Found the final answer to 5 decimal places.) Variance b-2 What was the standard deviation of Regina's returns over this penod? (Do not raund intermediate calculations. Round the final answer to 1 decimal place) Standard deviation