Required: o. 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 ond "Voriance" to 4 decimal ploces.) b. Calculate the value of the covariance between the stock and bond funds. (Negative volue should be indicated by a minus sign, Do not round intermediate colculations. Round your onswer to 4 decimal places.) Answer is complete but not entirely correct