3. Determine vector and parametric equations for the plane containing the point Po(2, 3, -1) and the line with equation (x, y z) = (3,0,2) + u (2,1,1), where u is a parameter. 4. The vector equation of a plane is p = (-2,0,1) + s(-4,2,1) + 1(1,-1,2). Determine if the point (-4, 0, 6) lies in the plane. Show your work