C++ template - non member functions

Question

I am trying to implement insertOrdered class method for double-linked list in C++ (I am newbie to C++). The issue are errors which originate from defined util functions (non class functions) which are called from insertOrderedmethod. The g++ compiler shows the errors which are written here as comments: //error: ....

Can someone tell me how to resolve the errors. Thanks.

LinkedList.h:

template <typename T>
class LinkedList 
{
   public:
       class Node 
       {
           public:
             Node* next;
             Node* prev;
             T data;

           ...
       }

       void insertOrdered(const T& newData);

   private:
      Node* head;
       
   ...
}

Task.h:

#include "LinkedList.h"

template <typename T>
bool insertWhenEmpty(LinkedList<T> list, const T& data)
{
     auto newNode = new LinkedList<T>::Node(data); //error: expected type-specifier
     ....
}

template <typename T>
void insertBefore(LinkedList<T> list, LinkedList<T>::Node curr, const T& data)
{
   //error: LinkedList<T>::Node curr -> use the 'typename' keyword to treat nontype "LinkedList<T>::Node [with T=T]" as a type in a dependent context
   ....
}
     
template <typename T>
void LinkedList<T>::insertOrdered(const T& newData)
{
    if (insertWhenEmpty(this, newData))
       return;

    ....
    auto curr = this->head;
    insertBefore(this, curr, newData);
    ....
}