Q3: Design An abstract superclass called Person, It contains: Two private instance variables: name (String), and address (String). One constructor to initialize the name and address with the given...

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Extracted text: Q3: Design An abstract superclass called Person, It contains: Two private instance variables: name (String), and address (String). One constructor to initialize the name and address with the given values. A toString() method that returns name and address as single String. An abstract method displayInfo() method. subclasses Student class contains: four instance variables: numCourses (int), courses (array of string to store name of 3 courses) greads(array of int to store grade of 3 courses) and MAX_COURSES (int constant represent the maximum number of courses). One constructor to initialize the name and address with the given values. A toString() method that returns "student: name address" addCoursesGrade(course, grade) method, if possible , to add a course with grade. • printGrades() method : to print all courses taken and the average grade. • getAverageGrade() method : to compute the average grade and return it. Override displayInfo() method to display name and address and average.