C++ operator overloading, recursion project

Based on the following Rectangle class - class Rectangle { double width; double height; public: double area() {return width * height;} void setHeight(double h) {height = h;} void setWidth(double w) {width = w;} double getHeight() {return height;} double getWidth() {return width;} }; Assuming all measurements in the question is in inch. 1. Please add a public function that overload "+=" operator. The function takes as parameter of a Rectangle object. The width and height of the object should be added to the width and the height of the current (this) object. 2. Please add a public recursion function that calculates how many tiles needed to fill up the area of the Rectangle object. Each tile is 2.1*3.2. The result should be an integer (ceiling). Please do NOT use division calculation to get the result (too trivial), but use recursion technique to resolve the issue. [Hint: The results of division can be obtained by repeated subtraction.] 3. Please create some test code in your main() function to test the two functions you created.