# Math Help - Vector Diagram

1. ## Vector Diagram

The diagram shows a cube, where AB = u, AD = v and AE = w.
Determine a single vector equivalent to each of the following:

a) u + v + w
b) u + v - w
c) u - v + w
d) u - v - w

So far I have:
a) AB + AD + AE
= AB + BC + AE
= AC + AE
= CE

Not sure where to go from here.