I dont know how to get the three numbers totaled, and how to divide them with the constant. help.Code:#include <iostream> #include <string> using std::cout; using std::endl; using std::cin; using std::string; int main() { const int AVERAGE = ; int number; cout << "Pick a number!: "; cin >> number; cout << "Another number: "; cin >> number; cout << "Last number!!: "; cin >> number; cout << "\nThe avereage is: " << (AVERAGE) << "\n"; system("\nPAUSE"); return 0; }