Question 17 Which of the following are subspaces of R'?
(1) span {(1,0,1),(0,1,1)
(2) {(1,0,1),(0,1,1),(1,1,0)}
(3){(a, b+c-a) : a, b,care real numbers)
(4) {(a, b, 1) : a, bare real numbers)
(2) only
(1) and (4)
(1) only
(2) and (4)
(4) only
all 4 sets are subspaces
3 sets are subspaces
(2) and (3)
(3) only
(3) and (4)
(1) and (2)
(1) and (3)