A method secret () of a class F is shown below: public int secret (String[] stringArray, int n) { int num = 0; } for (int i=0; i = 0) num++; return num; A program segment using the method is: (a) Ff = new F(); String[] array01 = {"an", "easy", "exam", "on", "Java"}; System.out.println(f.secret (array01, 2)); array01 = new String[0]; System.out.println(f.secret (array01, 3)); Write down the output when the above segment is executed. (b) Explain, in a paragraph, what is the purpose of the method secret().