USING C++, write the implementation file to go with this c++ header file. im cofused by the operator overloading part and the copy constructor parts

the most

#ifndef LETTERBAG_H #define LETTERBAG_H #include  #include  using namespace std; class LetterBag { public: LetterBag() ; // no-parameter constructor for an empty LetterBag. // initialize counts using letters in v, omitting non letters. // e.g. v = {'6','A','b','C','a','G','g','G','g','B','b','%','g'} // means counts = {2,3,1,0,0,0,5,...} and size = 10. LetterBag(const vector & v); // similar to the vector constructor but using a string to initialize. LetterBag(const string & s); // return this->size int getCurrentSize() const; // return the current size of the LetterBag // return true iff this->size is zero bool isEmpty() const; // insert ch into a copy of the current object and return the copy. // if ch is out of range, do nothing. LetterBag operator+(char ch) const; // insert ch into the current object and return the current object // if ch is out of range, do nothing. LetterBag & operator+=(char ch); // add the contents of other to a copy of the current object and return the copy. LetterBag operator+(const LetterBag & other) const; // add the contents of other the current object and return the current object. LetterBag & operator+=(const LetterBag & other); // remove one occurrence of ch from a copy of the current object and return the copy. // if ch is out of range or has count equal to zero do nothing. LetterBag operator-(char ch) const; // remove one occurrence of ch from the current object and return the current object. // if ch is out of range or has count equal to zero do nothing. LetterBag & operator-=(char ch); // remove the contents of other from a copy of the current object and return the copy. // note: anytime the count of a letter in other exceeds the count in this, set count to zero. // size should be changed appropriately. LetterBag operator-(const LetterBag & other) const; // remove the contents of other from the current object and return the current object. // You can do this cone by calling operator-. LetterBag & operator-=(const LetterBag & other); // remove all occurence occurrence of ch from the current object. // if ch is out of range or has count equal to zero do nothing. void removeAll(char ch); // remove all occurrences of all letters from the current object and set size to zero. void clear(); // return the number of occurence of ch in the current object. int getFrequency(char c) const; // return a vector with the letters in this object, in sorted order and lowercase. vector toVector() const; // return a string with the letters in this object, in sorted order and lowercase. string toString() const; // return true if the current object is a proper subbag of other. bool operator<(const LetterBag & other) const; // return true if the current object is a subbag of other and false otherwise. bool operator<=(const LetterBag & other) const; // return true if the other is a proper subbag of the current object and false otherwise. // note proper subbag means it's a subbag but not equal to the other bag. bool operator>(const LetterBag & other) const; // return true if the other is a subbag of the current object. bool operator>=(const LetterBag & other) const; // return true iff the current object and other are equal. bool operator==(const LetterBag & other) const; // return false iff the current object and other are equal. bool operator!=(const LetterBag & other) const; private: int counts[26]; // counts[0] represents the number of 'a's etc. // return true iff ch is in range 'a'...'z' or 'A'...'Z' static bool inRange(char ch); int size; // total number of letters in the current object (equals the sum of the counts array) }; #endif