Binary tree inorder traversal of the given binary tree Need code in c++ Example 1: 1 3 2 Input: root = [1,null,2,3] Output: [1,3,2] Example 2: Input: root [1] Output: [

struct insert_into_bst { // Function takes a constant Book as a parameter, inserts that book indexed by // the book's ISBN into a binary search tree, and returns nothing. void operator()(const Book& book) { // // TO-DO (7) ||| ///// // Write the lines of code to insert the key (book's ISBN) and value // ("book") pair into "my_bst". END-TO-DO (7) | } std::map& my_bst; };

#ifndef BT_NODE_H#define BT_NODE_H struct btNode{   int data;   btNode* left;   btNode* right;}; // pre:  bst_root is root pointer of a binary search tree (may be 0 for//       empty tree) and portArray has the base address of an array large//       enough to hold all the data items in the binary search tree// post: The binary search tree has been traversed in-order and the data//       values are written (as they are encountered) to portArray in//       increasing positional order starting from the first elementvoid portToArrayInOrder(btNode* bst_root, int* portArray);void portToArrayInOrderAux(btNode* bst_root, int* portArray, int& portIndex); // pre:  (none)// post: dynamic memory of all the nodes of the tree rooted at root has been//       freed up (returned back to heap/freestore) and the tree is now empty//       (root pointer contains the null address)void tree_clear(btNode*& root); // pre:  (none)// post: # of nodes contained in tree rooted at root is returnedint…

The constructed B+ index is shown on the figure below: X y 25 W Z P 1 10 16 23 25 31 36 45 52 61 69 Show the state of the index after each of the following operations: a) Write the missing values x,y,w,z into the initial status of the tree