1. a) Find the equation of the plane that passes through the points (2, 3, -1), (3, 4, 2)and (1,-1,0). Show all your work. (2 points) b) Find the equation of the plane that passes through the point (1, 2, 3) and that is parallel to the plane 4x - 3y + 2z = 1. Show your work. (1 point)