If a = 4, then -2 a =? 0 4 2 O -8 OA vector parallel to the vector u = 1, - 2, 3 is: O (-2, 4, - 8 O (2, - 4, - 6) O (-3, 6, - 9) O (-1, 2, 3)Show all your work Elation.r stein}, using correct mathematical notations, for full marks. Question 9 II? points] Giiitzn> = (2, 4, 3),;> (3, 1, 7),nu:l a} 3;} 4;} [2 points] [3 points] bi F} +2>| 12111 [2 points]