I've two question, please help me to solve.
A line with gradient 4 touches the parabola with equation y^2 = 4x. Find the coordinates of the point of contact of this tangent with the parabola and an equation of the normal to the parabola at that point.
The line with equation y = m(x+a), where ‘m’ can vary but ‘a’ is constant, meets the parabola with equation y^2 = 4ax in two points P and Q. Find, in terms of a and m, the coordinates of the mid-point R of PQ. As m varies show that R lies on the curve with equation y^2 = 2a(x+a).