4. (10 points) Let S1=span{(1,0,0),(1,1,0)} and S2=span{(,0,0,1),(0,1,0)} be subspaces of R3 Determine the dimension and besis for the subspace S1S2 the set of all vectors in both S1 and S2. Hint:Remember this subspace would be in the span of both subspaces