For 5 observations of pairs of variables X and Y, the following results are obtained: , , , , …

For 5 observations of pairs $(x, y)$ of variables X and Y, the following results are obtained: $\sum x = 15$, $\sum y = 25$, $\sum x^2 = 55$, $\sum y^2 = 135$, $\sum xy = 83$. Calculate the value of $b_{xy}$ and $b_{yx}$.