Template class heap { public: heap(); // postcondition: empty heap has been created unsigned int size() const; // postcondition: number of elements in a heap has been returned bool is_empty() const; // postcondtion: returned whether the heap is empty void insert (const T& item); // postcondition: item has been added void remove(); // precondition: heap is not empty // postcondition: largest item has been removed from the heap T max() const; // precondition: heap is not empty // postcondition: copy of largest element in the heap has been returned T& max(); // precondition: heap is not empty // postcondition: access to largest element in the heap has been returned private: std::vector v; unsigned int max_child (unsigned int index) const; // precondition: element at index has children // postcondition: index of the larger child has been returned // if there is only 1 child - index of that child has been returned }; #include "heap. template"