Suppose Wolverine inc. had returns of 21%,12%,4%, and 31% over the past four years. What is the standard deviation of Wolverine inc. returns for the past four years? (Do not round intermediate calculations, Input your final answer as a percent rounded to two decimal places i.e. 12.34) Numeric Response Suppose Wolverine inc. had returns of 21%,12%,4%, and 31% over the past four years. What is the standard deviation of Wolverine inc. returns for the past four years? (Do not round intermediate calculations, Input your final answer as a percent rounded to two decimal places i.e. 12.34) Numeric Response