help with q1,2,q3 on seperate code in c++

Lab on Trees In class you learned that the binary tree data-structure could represented in computer memory contiguously or by random access. Using principled object oriented programming, represent a tree using contiguous access. The tree will be inputted into the computer layer-by-layer starting at the root. Input is terminated with-1 For example blue green yellow pink red purple orange black brown -1 Which yield the following tree structure blue green yello pink purple orange black Question 1. Output a pre-order traversal of the input tree. Output should all be on one line. e.g. output: blue green pink black brown red yellow purple orange put a In-order tra should all ttree. Output s e.g. output black pink brown green red blue purple yellow orange Question 3. Output a post-order traversal of the input tree. Output should all be on one line e.g. output: black brown pink red green purple orange yellow blue