(3%) This question considers binary trees with 5 nodes. The preorder and post order traversal results are stored in the ordered lists {x1, x2, x3, x4, x5} and {y1, y2, y3, y4, y5}, respectively. Furthermore, $\sum_{i=1}^{5}|x_i - y_i| = 6$. Which of the following binary tree(s) satisfies(satisfy) the condition?