. . . . . . 5 2 . (10) F1nd a vector 1n space w1th two d1rectlonal cosmes equal to and ' If no such vector ex1sts explain why. 6 (11) Consider vectors u : (1,2,3), v : (4, 1/2, 1) and w = (2, 4, 6). (a) Find all pairs of parallel vectors. You must clearly demonstrate (with a computation) why (or why not) they are parallel. (b) Find all pairs of orthogonal vectors. You must clearly demonstrate (with a computation) why (or why not) they are orthogonal