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. Year 1 2. 3 4 5 Returns Y 9% 22 % 27 43 16 -11 -17 -25 18 51 Requirement 1: (a)The arithmetic average return of company X's stock is: (Click to select) (b)The arithmetic average return of company Y's stock is: (Click to select) Requirement 2: The historical variance of company X's stock returns is: (Do not round intermediate (a) calculations.) (Click to select) The historical variance of company Y's stock returns is: (Do not round intermediate (b) calculations.) (Click to select) Requirement 3: (a) The historical standard deviation of company X's stock returns is: (Do not round 'intermediate calculations.) (Click to select) The historical standard deviation of company Y's stock returns is: (Do not round (b)intermediate calculations.)