java

Choose the correct line of code for each of the set methods and answer the question below: public class Rectangle \{ private static double length; private static double width; public static void setLength (double length) \{ \} / / END setLength (double) public static void setWidth (double width) \{ \} / / END setWidth (double) \} / /END Rectangle CLASS What concept is illustrated by this code? null length = length; Rectangle.length = length; width = width; Rectangle. width = width