3 Consider a binary tree with 13-nodes. Ils visits return the following sequences 2 Pre-order: In order: Post-oder NX A D D 11 D 1 X Y SY V D v v W K z M Report the sequence of keys stored on the leaves of the tree, moving on the tree from left to right. Please report the list of keys on the same re separated by a single space No other symbols must be included in the response. This is an example of the response format. AXC Y etc