P12-9 Calculating Returns and Variability [LO1] 20 2 points You've observed the following returns on Crash-n-Burn Computer's stock over the past five years: 6 percent, -12 percent, 28 percent, 21 percent, and 13 percent. Requirement 1: What was the arithmetic average return on Crash-n-Burn's stock over this five year period? (Click to select) References Requirement 2: (a)What was the variance of Crash-n-Burn's returns over this period? (Do not round intermediate calculations.) (Click to select) (b)What was the standard deviation of Crash-n-Burn's returns over this period? (Do not round intermediate calculations.) (Click to select)