Let r be the straight line that passes through the point A(3,6,4), intersects the z axis and is parallel to the plane π: 2x+7y+z=7. Mark the alternative that corresponds to the point of intersection...

Let r be the straight line that passes through the point A(3,6,4), intersects the z axis and is parallel to the plane π: 2x+7y+z=7. Mark the alternative that corresponds to the point of intersection of the line r with the xy plane.