hello. from my 'Cartesian Equation of a Plane' lesson under vectors. pls help.

5. Determine the Cartesian equation of the plane that contains the three points A(-2,3,1), B(3,4,5) and C(1,1,0).8. Determine the Cartesian equation of the plane containing the point P(-1,1,0) and perpendicular to the line between the points A(1,2,1) and B (3, -2,0)