Consider the following table: Stock Fund Bond Fund Rate of Retun Probability Rate of Return Severe recession Mid reoession Normal growsh 0.20 0.40 0.30 38% -18% 23% 28% 17% 10% Boom 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 2 decimal places) Mean return Variance %-squared b. Calculate the vallue 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 2 decimal places %-squared