if focus of a parabola is(1,2) and feet of perpendiculars on any two tangents to this parabola from locus are (3,4) and (4,6) then the vertex of parabola is
if focus of a parabola is(1,2) and feet of perpendiculars on any two tangents to this parabola from locus are (3,4) and (4,6) then the vertex of parabola is