the programming language is java

xiv. What is "this" in Java? xv. Briefly describe the two uses of this in a constructor xvi. Briefly describe what an activation record is and what it is used for xvii. Java provides eight primitive wrapper classes. Explain what they are xviii. Briefly describe the entire process of adding a file to you local Git repository to updating your GitHub repository to include this file xix. When using git, explain the difference between the commit and the push commands xx. Strings are immutable in Java. What does this mean? xxi. Can a Java class have zero constructors? (Explain yes or no.) xxii. Given String s -new String("cat"); and String t-"cat", draw the box& arrow diagram for these two variables