Java Inheritance II Hackerrank Solution For Explanation Watch Video: Input Format You are not responsible for reading any input from stdin; a locked code stub will test your submission by calling the add method on an Adder object and passing it integer parameters. Output Format You are not responsible for printing anything to stdout. Your add method must return the sum of its parameters. Sample Output The main method in the Solution class above should print the following: My superclass is: Arithmetic 42 13 20 Code: import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; class Arithmetic{ public int add( int a, int b){ return a+b; } } class Adder extends Arithmetic{ ...