I need help with part b and c. Part B needs to be rounded to 6 decimal places. Thank you!

mie remaining. 58.22 3. 25.000 points You did not receive full credit for this question in a previous attempt You've observed the following returns on Barnett Corporation's stock over the past five years: -25.5 percent, 14 percent, 31 percent, 2.5 percent, and 21.5 percent. What was the arithmetic average return on the stock over this five-year period? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Arithmetic average return l 8.7% What was the variance of the returns over this period? (Do not round intermediate calculations and round your answer to 6 decimal places, e.g., 32.161616.0 Variance What was the standard deviation of the returns over this period? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Standard deviation l References eBook & Resources