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.

Thanks in advance