To find the ratio in which the line segment joining the points $A(5,3)$ and $B(-1,6)$ is divided by the Y-axis, we can use the section formula.

Steps:

1. Since the Y-axis divides the line segment, the point dividing it will have $x = 0$ (as all points on the Y-axis have $x = 0$).
2. Let the required ratio be $m:n$. The coordinates of the point dividing the