Consider the following table: Scenario Probability Severe recession 0.10 Mild recession 0.20 Normal growth 0.35 Boom 0.35 Stock Fund Rate of Return -374 -110 140 308 Bond Fund Rate of Return -98 154 88 -58 a. Calculate the values of mean return and variance for the stock fund. (Do not round intermediate calculations. Round "Mean return" value to 1 decimal place and "Variance" to 4 decimal places.) Mean return Variance % %-Squared b. Calculate the value of the covariance between the stock and bond funds, (Negative value should be indicated by a minus sign. Do not round intermediate calculations. Round your answer to 4 decimal places.) Covariance %-Squared