2)- Write the main program for the following .h class and create test an object 1 // Specification file for the Rectangle class // This version uses some inline member functions. private: double width; double length; public: 2 3 #ifndef RECTANGLE H 4 #define RECTANGLE_H 5 6 class Rectangle 7 { 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 }; void setWidth (double); void setLength (double); double getWidth() const {return width; } double getLength() const { return length; } double getArea () const { return width length; }