Let W=span{(1,2,0),(0,1,1)}W = \text{span}\{(1, 2, 0), (0, 1, 1)\}W=span{(1,2,0),(0,1,1)}. Which vector is in the orthogonal complement W⊥W^\perpW⊥?
(2,−1,1)(2, -1, 1)(2,−1,1)
(1,2,0)(1, 2, 0)(1,2,0)
(2,−1,−1)(2, -1, -1)(2,−1,−1)
(1,1,1)(1, 1, 1)(1,1,1)