Determine the angle between the planes x + 2y – 3z – 4 = 0 and x + 2y – 1 = 0.b. Determine the Cartesian equation of the plane that passes through the x - 3 y + 1 point P(1, 2, 1) and is perpendicular to the line x-3/-2 = y+1/3 = z+4/1