4. (10 points) Write a method body for the Natural Number instance method whose contract is given below. Note that this is a restores-mode parameter. For full credit, you must use only one return statement and restore this without making a copy of it. /** * Reports true if this is odd, false otherwise. add * = true * @ensures * isodd = [this is odd] argument 11 false */ public boolean is odd (= new Natural Number2(0);" rolNumber zero