Point of an intersecting line and plane

[Ultim]

Hello,

I am trying to work with moving objects using the mouse.
for doing this I want to calculate the position of the mouse on XY plane.
When the XY coordinates are known i want to move the ball to those XY coordinates.
I have a ball in my world which will be the object of moving.

here is the code so far:
plane = vizshape.addPlane()
plane.setPosition(0,0,ball.getPosition[2])
mouseposition = Camera.main.ScreenPointToRay(Input.mousePosition);

I tried to use viz.intersect but got a lot of errors.
do you guys have any advice.

With kind regards.