Use position, rotation and scale of null with single x,y point param
I have an an effect that has an entry for Source - which is a point x,y param. The layer has been tracked and the motion applied to null object "Null 1"
I have keyframes on Position, rotation, scale for "Null 1"
What expression will capture the transform for Position, Rotation, Scale and apply it to the x,y co-ordinates of the Source - point parameter ?