11. [after $7.9] Assume that a BodyWeight class contains only one setWeight method-a two-parameter version with the parameters double weight and String units. Write two constructors for the Bodyweight class, one with one argument (double weight), and the other with two arguments (double weight and String units). For the one-argument constructor, use the default of "kg" for 320 Chapter 7 Object-Oriented Programming-Additional Details units. Avoid code redundancy. That is, have the one-parameter constructor call the two-parameter con- output, structor, and have the two-parameter constructor call the two-parameter setWeight method. 12. [after 7.9] Assume that the following two classes are compiled and run. What is the output? You don't have to provide a formal trace-you just have to show the output. But to determine the you'll need to do an informal trace either in your head or with a few notes. You are encouraged to verify your answer by running the program on a computer. Running the program is for verification purposes, not for coming up with the answer in the first place. You should be able to understand how the program works by just examining its code. public class ConfuseMeDriver [ } public static void main(String[] args) ConfuseMe confuse = new ConfuseMe(); confuse.display(); } //end ConfuseMeDriver class public class ConfuseMe { private int x = 40%; } } public ConfuseMe() { this(25); System.out.println(this.x); public Confuse Me (int x) { System.out.println(this.x); System.out.println(x); this.x = 10; x = 50; public void display() { int x = 30; display(x); System.out.println(x); back (d public void display(int x) { } x += 15; System.out.println(x); ] // end ConfuseMe class static modifiers. (T/F) 13. [after 7.10] An object's methods cannot alter the value of one of its class's variables that has private