8. The diagram below shows a cube. Making reference to the points labeled on the cube, determine a single vector equivalent to each of the following: a) wtu-v b) -u -v+ w [2] E H F G AD A B 9. If v=[2,-5]and w=[x,7] find the value(s) of x such that (7 + w/=2. [4] 10. Given points P(1,5), Q(4,-6) and R(-10,0), find the Cartesian form of the vector PO - RP [3]