15.5.22 Two-dimensional random variables and their characteristics

Condition: A table of the distribution of two random variables is given. Calculate the coefficient of covariance. \begin{tabular}{|c|c|c|} \hline\( X \backslash Y \) & 1 & 6 \\ \hline-2 & 0.3 & 0.1 \\ \hline 1 & 0.2 & 0.4 \\ \hline \end{tabular}