The tangent at any point P on `y^2 = 4x` meets x-axis at Q, then locus of mid point of PQ will be

If P is the point (1,0) and Q is any point on the parabola y^(2) = 8x then the locus of mid - point of PQ is

The normal at a point P, on the ellipse x^2+4y^2=16 meets the x-axis at Q. If M is the mid-point of the line segment PQ, then the locus of M intersects the latus-rectum of the given ellipse at the points :

Let p be the point (1,0) and Q a point on the locurs y^(2)=8x the locus of mid point of PQ is