Write a C++ class (not a class template) called Inventoryltem. Your class should include: - two private data members: id (an integer) quantity (an integer) - all member functions should be public. - a default (no argument) constructor that sets id and quantity to zero - an accessor method called getld that has no parameters and returns the value of the id data member. This should be a constant method. - An accessor method called getQuantity that has no parameters and returns the value of the quantity data member. This should be a constant method. - A method called setld that has one integer parameter. This method will store the value of the parameter in the id data member. - A method called add that can be used to increase the quantity of an inventory item. This method has a single integer parameter (say called num) and returns a boolean value. If num is positive, data member quantity is incremented by num and the method returns true (update was successful). Othervise, the object is not modified and the method returns false (invalid - A method called remove that can be used to decrease the quantity of an inventory item. This method has a single integer parameter (say called num) and returns a boolean value If num is request). positive and less than or equal to quantity, data member quantity should be decremented (decreased) by num and the method returns true (update was successiul) Othenwise, the object is not modified and the method returns false (invalid request) Your class definition should contain only data fields and method prototypes. The implementations for your methods should be outside the class definition. Write you answer in the text box below