Consider the following table: a. Calculate the values of mean return and vanance for the stock fund. (Do not round intermediate calculations. Roun "Mean return" value to 1 decimal plece and "Varience" to 4 decimal places.) 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.)