The variances of the annual returns for the United Airlines and Trader Joes stocks are $0\mathrm{.}1485$ and $0\mathrm{.}0997,$ respectively. The covariance between the annual returns on these two stocks is $0\mathrm{.}0455.$ Calculate the variance of a portfolio consisting of $40$ percent United Airlines stock and $60$ percent Trader Joes stock.

Answer choices:

A$)\mathrm{.}0799$

B$)\mathrm{.}0872$

C$)\mathrm{.}0845$

D$)\mathrm{.}0823$