I tried these and wasn't able to figure them out.

6. Given #7 = [2, - 5]and V = [-7,2] find a. 5u (1 mark) b. it (1 mark) c. IVI (1 mark) 7. Given u = [- 4,4, - 4] and # = [-5,6, 2] find a. 21 + 4V (1 mark) b. it (1 mark) c. u X V (1 mark) d. lil (1 mark) 8. Find u . (1 mark) 2/4 55 lul = 23 IV = 31 9. Find the volume of the parallelepiped defined by the vectors. (2 marks) 1 = [8, - 3,4]V = [-2,9, 1]W = [0, -4, -7] 10. Given # = [10,4] and # = [12, - 13], find the projection of i on V. (2 marks) 11. Given the force, in Newtons, to be [15,12] for an object moving along the vector [7,3] in metres, find the work done. (1 mark)