Propose a definition of a preorder traversal for ternary trees, and give pseudocode for accomplishing such a traversal.

Question: Define preorder traversal for ternary trees and provide a pseudocode for performing the traversal. Answer: Preorder traversal for ternary trees is an extension of the preorder traversal method used for binary trees, where each node can have at most 3 children - left, middle, and right. In this traversal, the order is Root, Left, Middle, and Right. First, visit the root node, then traverse its left subtree, followed by its middle subtree, and finally, traverse its right subtree. The pseudocode for preorder traversal in ternary trees is as follows: ``` function preorder_traversal(node): if node is None: return # Visit the root node print(node.data) # Traverse left subtree preorder_traversal(node.left) # Traverse middle subtree preorder_traversal(node.middle) # Traverse right subtree preorder_traversal(node.right) ```