A supermarket employee put various brands of shampoo on the shelf. It is known that there are five brands of shampoo, E, F, G, H, I, etc. , arranged on the shelf from left to right. Shelf requirements: ① F is close to the left of H, ②I is adjacent to E, ③G is to the left of F. If I is to the left of G, Which of the following ____ items must be true. ['E is immediate to the left of G.', 'G is to the left of F.', 'I is immediate to the left of G.', 'E is immediate to the left of F.']