Find a basis for W=span(v1,v2,v3) where v1 =...,v2=..., v3=... and state the dimension of W.

V1=(1,2,3) V2=(2,0,5) V3=(5,2,10)

NOTE: After each comma is a new row. So these are all 1 column with 3 rows matrices.

Can someone please give a clue how to start this question?