This class is missing a number of functions. Rewrite the class declaration to follow best practices, e.g., operators, three important functions, and printing. The functions you write must be const- correct. You do not need to create, an iterator, begin function, or end function. typedef std::string Date; /** * Describe one appointment--as would be listed in * a personal calendar */ class Appointment { private: Date date; std::string organizer; Attendee attendeeList; public: /** * Create an empty Appointment */ Appointment() bool addAttendee (const Attendee & person); };