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Exercise \# 1: Lab Exercise Implement the your own StringBuilder class that extends from The StringBuilder class is provided in the Java library. ( your class name will be "text): Add the following methods to make your own changes on your text: - public text (String s); - public text append(text s); - public text append(int i); - public int length 0 ; - public char charAt(int index); - public text toLowerCase(); - public text substring(int begin, int end); - public String toString() Exercise \# 2: (The Person, Student, Employee, Faculty, and Staff classes) Design a class named Person and its two subclasses named Student and Employee. Make Faculty and Staff subclasses of Employee. A person has a name, address, phone number, and e-mail address. A student has a class status (freshman, sophomore, junior, or senior). Define the status as a constant. An employee has an office, salary, and date hired. A faculty member has office hours and a rank. A staff member has a title. Override the toString method in each class to display the class name and the person's name. Write a test program that creates a Person, Student, Employee, Faculty, and Staff, and invokes their tostring 0 methods