Question $1$: $[2$ polnts$]$ Based on the binary tree in Figure $1,$ please answer the questions

$\backslash$table$[[$a$,$ List all possible replacements for node $5],[$if we delete node $5.]]$

c$.$ Indicate whether the tree is balanced or not based on the BF$,$ with an explanation.

d$.$ What is the

The most$-$left node

The most$-$right node

e$.$ List all the following:

All internal nodes

All leaf nodes

f$.-$ All ancestors of $7$

All descendants of $12$