Consider the public iterative method getFrequencyOf in the class ArrayBag, as given in Segment 2.20 of Chapter 2. Write a private recursive method that getFrequencyOf can call, and revise the...

Consider the public iterative method getFrequencyOf in the class ArrayBag, as given in Segment 2.20 of Chapter 2. Write a private recursive method that getFrequencyOf can call, and revise the definition of getFrequencyOf accordingly. Hints: Although the method getIndexOf might not look at every entry in the array, getFrequencyOf must do so. The recursive method has one base case and must choose between two recursive steps.