Create a class named StudentGrade. Include fields for a student ID number, student name (u...

Create a class named StudentGrade. Include fields for a student ID number, student name (use the Person class from Exercise), numeric test score, possible points, and letter grade. Create a constructor that requires the student ID, name, and test score, and allows a fourth parameter that holds possible test points. If a value for possible points is not passed to the constructor, the possible points value defaults to 100. (If a 0 value is passed for possible points, force possible points to 1 so that you do not divide by 0 when calculating a grade.) The constructor calculates the student’s percentage (divides score by possible points) and assigns a letter grade based on: 90% and above (A), 80% (B), 70% (C), and 60% (D). Create a main()function that instantiates and displays enough StudentGrade objects to test a variety of scores and possible point values. Save the file as StudentGrade.cpp.

Exercise

Create a Person class that includes fields for last name, first name, and zip code. Include a default constructor that initializes last name, first name, and zip code to “X” if no arguments are supplied. Also include a display function. Write a main()function that instantiates and displays two Person objects: one that uses the default values, and one for which you supply your own values. Save the file as Person.cpp. You will use the Person class in other exercises.