The table below shows historical annual returns for stocks of companies X and Y over recent years. Calculate the arithmetic average returns. In addition, calculate their historical variances, as well as their historical standard deviations. Requirement 1: (a) The arithmetic average return of company X 's stock is: (b)The arithmetic average return of company Y 's stock is: Requirement 2: (a) The historical variance of company X 's stock returns is: (Do not round intermediate calculations.) (a)The arithmetic average return of company X's stock is: (b)The arithmetic average return of company Y's stock is: Requirement 2: (a) The historical variance of company X's stock returns is: (Do not round intermediate calculations.) (b) The historical variance of company Y's stock returns is: (Do not round intermediate calculations.) Requirement 3: (a) The historical standard deviation of company X's stock returns is: (Do not round intermediate calculations.) (b) ine historical standard deviation of company Y's stock returns is: (Do not round intermediate calculations.) Requirement 1: (a) The arithmetic average return of company X s stock is: (b)The arithmetic average return of company Y's stock is: 22.75% 20.57% 22.20% 18.20% Requirement 2: (a) The historical variance of company X 's stock returns is: (Do calculations.) (b) The historical variance of company Y's stock returns is: (Do calculations.) andard deviation of company X 's stock ret culations.) Requirement 3 : (a) The historical standard deviation of company X 's stock returns intermediate calculations.) tandard deviation of company Y 's stock returns is: (culations.) (b) The historical standard deviation of company Y's stock returns is: (Do no (b) intermediate calculations.)