Consider the following table: Scenario Severe recession Mild recession Normal growth Boom Stock Fund Probability Rate of Return 0.10 -424 -22 0.40 274 328 0.28 Bond Fund Rate of Return -9% 15% 88 --5% 2.38 Required: 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 b. Calculate the value of the covence not round intermediate calcul we the stock and bond funds. (Negative value should be indicated by a minus sign. Do nswer to 2 decimal places.) Covariance