how do you calculate the variance and what is the answer?

Use the following returns for X and Y Returns Year 2 3 4 5 x 22 90/0 -17.9 109 21.8 59 29.7% 31.7 -16.8 35.7 Calculate the average returns for X and Y (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g. , 32.16.) x Avera e returns 872 0/0 15.08 0/0 Calculate the variances for X and Y. (Do not round intermediate calculations and round your answers to 6 decimal places, e.g. Variances x , 32.161616.) Calculate the standard deviations for X and Y. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g. Standard deviations 16.53 24.14 % , 32.16.)