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1 Let A (- 5, - 1), B ( - 3, 3), C ( - 3, 1), D 1- 1, 5). Calculate the vector 2 AB + CD . 2 Let A ( 2, 1, 0), B ( 4,- 1, 1), C ( 2, 4, 4), Find the angle of the triangle with vertices A, B, C at the vertex B. 3 Find the area of the tangle with vertices A ( 2, 1, 0), B ( 4 , - 1 , 1 ) , C ( 1 , 3 , - 1). (4) Where does the line through ( -1, - 1, -1) and ( 1, 1, 1) intersect the plane given by x-y + 2 = 2 ? 5 Find the parametric equation of the line of intersection of the planes given by z+ 24 + 3 2 =6 and *+ 4+ 2= 3