We have the points A(-2, 1, 3), B(1,0,1), and C(2,3,2) which form the triangle ABC in 3-space. a) By constructing the position vectors AB and AC, determine the area of the triangle. (3 marks) b) By constructing the position vectors BC and CA, determine the area of the triangle. (3 marks) c) Based on your answers above, what conclusion can be drawn? (2 marks)