Material for Questions 1 and 2. Let T be a binary tree whose preorder and inorder node sequences are: Preorder: A BC DE F GHIJ K InorderCBED GFHA JI K Question 1. (5 points) The postorder sequence of the nodes of T is (choose the best answer) 1. CEG HF D B JIKA 2. CEGHF D BJKIA 3. CEGHF D BIJK A 4. BCEGHFDJKIA 5. None of the above Question 2. (5 points) The level-order sequence of the nodes of T is (choose the best answer): 1. ABICDEFJK GH 2. ABCDIEF JKGH 3. A BICDJKEF GH 4. ABICDJKEFH G 5. None of the above