Given the following binary tree:

A $-$ G should be formed with your student ID$.$ The numbers A $-$ G are generated as follows:

For example, the student ID is $20563755$A$.$ Values of $A$ to $G$ are: $20,5,56,63,37,75,55$

use the following student ID number : $21084996$ a

$($If the starting digit is $0,$ just remove it$)$

$($a$)$ Draw the tree with the integers filled.

$($b$)$ List the sequence of nodes visited by preorder traversal

$($c$)$ List the sequence of nodes visited by inorder traversal

$($d$)$ List the sequence of nodes visited by postorder traversal