1. Draw the state of memory diagram for the following code: String str1="University"; String str2="Technology"; Exchange(str1, str2); public void Exchange(String one, String two) { String temp = one; One = two; Two = temp; (3 Marks: 1 Mark for state of each variable) 2. What is the use of array of objects in Java? Illustrate with an example. (3 Marks: 2 mark for the explanation + 1 mark for correct illustration of example) 3. Discuss the difference between Str.concat(Word); and String1.append(Word); Where Str is a String object and String1 is a StringBuffer object. (2 Marks: 1 mark for the explanation of each)