$//$ Returns the maximum, minimum, and average area of shapes in the tree

$//$ An empty tree should not modify the maximum, minimum, or average $//$ Don't use recursion instead use an iterator to iterate across the tree

void max$\_$min$\_$avg$\_$area$($tree$\_$node$\_$t$*$ root, double$*$ max, double$*$ min, double$*$ avg$)$

$\{$ #define MAX$\_$DEPTH $30$

typedef struct $\{$

tree$\_$node$\_$t$*$ curr; $//$ Pointer to the current node

unsigned int depth; $//$ Current depth in the tree $($root is at depth $0)$

tree$\_$node$\_$t$*$ parents$[$MAX$\_$DEPTH$]$; $//$ Pointer to parent nodes

$\}$ tree$\_$iterator$\_$t; $//$ Helper struct for iterating through a tree $--$ represents a current location within the tree