The normal chord of the parabola `y^(2)=4ax` subtends a right angle at the focus.Then the end point of the chord is

The normal chord of the parabola y^(2)=4ax subtends a right angle at the vertex.Then the length of chord is

A normal chord of the parabola y^(2)=4ax subtends a right angle at the vertex if its slope is

If a normal chord at a point on the parabola y^(2)=4ax subtends a right angle at the vertex, then t equals

A variable chord PQ of the parabola y=4x^(2) subtends a right angle at the vertex. Then the locus of points of intersection of the tangents at P and Q is

If the normal chord at t on y^(2)=4ax subtends a right angle at vertex then t^(2)=