Parabola is a set of points that are equidistant from the point (focus)
and the line (directrix). Find the equation of the directrix of the parabola
\(x^{2} + 4x +8y-20= 0\).
The equation of a parabola is given by \( x^2 -8x +3y-2=0 \). Find the equation of a line, which passes through the vertex of this parabola and is parallel to the line \( 2x-5y+8=0 \).