Consider the following table:

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 $4$ 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.$)$