C$++,$ Visual Studio. I've been getting four LNK$2019$ errors on my project. I've been trying to fix them thinking there is a problem between the header and the $.$cpp file of BinarySearchTree. However I've come to realize that the methods I$\text{'}$m calling in my driver, while they have the same name, are not compatible with my BinarySearchTree. I would appreciate it if using the attached photos you could provide a fix that makes my driver compatible with the BinarySearchTree. Due to formatting issues the includes do not appear. The driver includes iostream. Driver.cpp: #include "BinarySearchTree.h$"$

#include

bool isSameTree$($const BinarySearchTree& tree$1,$ const BinarySearchTree& tree$2)\{$

return tree$1.$equals$($tree$2)$;

$\}$

int main$()\{$

BinarySearchTree tree$1,$ tree$2,$ tree$3,$ tree$4$;

$//$Adding elements to tree$1$

tree$1.$add$("$abc$")$;

tree$1.$add$("$def$")$;

tree$1.$add$("$ghi$")$;

$//$Adding elements to tree$2$ in a different order

tree$2.$add$("$def$")$;

tree$2.$add$("$abc$")$;

tree$2.$add$("$ghi$")$;

$//$Adding elements to tree$3$

tree$3.$add$("$abc$")$;

tree$3.$add$("$def$")$;

$//$Adding elements to tree$4$ with an extra element

tree$4.$add$("$def$")$;

tree$4.$add$("$abc$")$;

tree$4.$add$("$ghi$")$;

$//$Output comparison results. Expected result for trees $1$ and $2$: true. Expected result for trees $3$ and $4$: false.

std::cout $$ "Trees $1$ and $2$ are isSameTree$($tree$1,$ tree$2)?$ "the same." : "not the same."$)$ std::endl;

std::cout $$ "Trees $3$ and $4$ are isSameTree$($tree$3,$ tree$4)?$ "the same." : "not the same."$)$ std::endl;

return $0$;

$\}$