Consider the following code that use Singleton pattern to answer below questions? public class Singleton { private Singleton(){} public static Singleton getInstance(){ return SingletonHelper.INSTANCE; } private static class SingletonHelper{ private static final Singleton INSTANCE = new Singleton(); } } 1. (2 points) Does the above code ensure to have only one instance of class Singleton? Explain your answer? 1. (1 point) Write a code to show how Class A can get an instance of Singleton class? 1. (3 points) Is the above code considered thread-safe? Explain your answer? 1. (4 points) Rewrite the above code to to make it thread-safe using the idea of synchronization