Please answer.

I.)Where else can we see each of the conic sections aside 'om cirIce, ellipse, parabola and hyperbola.' 2.) What happen to the standard form of the circle if the center is at the origin (0,0)? 3.) From the circle 's standard form (X-h)"2 + (y-k)"2 = #2, What parts can be directly identied? 4. )What steps are taken in order to convert an equation of a circle from gen era] form to standard form