Find all possible solutions to W1 and W2.
Find the set of all vectors which are solutions to both systems and why it is a vector space.
The augmented matrix for the first is
In reduced tow eschelon form you get...
so we have two "free" variables we get the solution
The last two vectors span the solution space of the first matrix.
Try this proceedure with the second matrix and compare the solution spaces.
I hope this helps