9. Determine a Cartesian equation of the plane containing the points A (2, 4, -1), B(3, 0, 2), and C(-1, -2, 5). [4 marks] PART C: THINKING AND INQUIRY 10. Determine the equation of the line that passes through the point A(1, 0, 2) and intersects the line r = (-2, 3, 4) + s(1, 1, 2), s E R, at a right angle. [5 marks]