Exercise 5 : (2, I') unit vectors A = 4 2 - Z J B = - 32 + 7 in a euclidean frame. (a) Calculate A+ B, its magnitude, its direction Recall that angle i . U = 3. 7 = 1 ( 6 ) Calculate A-B, its magnitude, its cdirection = ] 0 angle ( c) Calculate the angle between A A + B and A- B