2. The code below sends and returns specific values for each put() and get(), identify the ??? values sent and returned in the following UML sequence diagram. public class ClassA { private int num = public int get() { return num; } public void put (int val) { num = val; } public class Exercise { public static void main(String[] args) { ClassA objl = new ClassA(); int valx = objl.get(); ClassA obj2 = new ClassA(); int valy = obj.get(); objl.put( valx + 1); obj2.put( valy - 1); objl.put( valy); Exercise main(...) new obj1 : Class get() ??? new obj2 : ClassA get(): ??? -put(???) -put(???) -put(???) 1