Implement the automobile.cpp class below

Automobile.hpp

#pragma once
	#include
	#include
	class Automobile {
	friend bool operator==( const Automobile& lhs, const Automobile& rhs );
	friend std::ostream & operator<<( std::ostream& stream, const Automobile& vehicle );
	private:
	std::string color_;
	std::string brand_;
	std::string model_;
	std::string plateNumber_;
	public:
	Automobile( const std::string & color,
	const std::string & brand,
	const std::string & model,
	const std::string & plateNumber );
	};
	bool operator!=( const Automobile& lhs, const Automobile& rhs );

Automobile.cpp

#include
	#include
	#include "Automobile.hpp"
	/*******************************************************************************
	** Member function definitions
	*******************************************************************************/
	Automobile::Automobile( const std::string & color,
	const std::string & brand,
	const std::string & model,
	const std::string & plateNumber )
	: color_(color), brand_(brand), model_(model), plateNumber_(plateNumber)
	{}
	/*******************************************************************************
	** Non-member function definitions
	*******************************************************************************/
	bool operator==( const Automobile& lhs, const Automobile& rhs ) {
	/// To be completed:
	/// Return true if each attribute of the left hand side (lhs) is
	/// equal to the right hand side (rhs)
	. . .
	///
	}
	bool operator!=( const Automobile& lhs, const Automobile& rhs )
	{ return !( lhs == rhs ); }
	std::ostream & operator<<( std::ostream& stream, const Automobile& vehicle )
	{
	/// To be completed:
	/// Insert the vehicle's color, brand, model, and license plate number into the stream, then return the stream
	. . .
	///
	}