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Now that the classList Array has been implemented, we need to create methods to access the list items.
Create the following static methods for the Student class:

1. getLastStudent() - returns the name of the last student in
the classList array

2. getClass Size() - returns the size of the classList

3. addStudent(int index, Student student) - adds a new student to
the classList at index index. This method is a little tricky - when the
new Student is added to the class, it will create a duplicate value at the
end of the classList because of our student constructor. This method
should also include a command to remove the extra student in
the classList added to the end.

4. getStudent(int index) - returns the name of a student at the index
specified

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Now that the classList Array has been implemented, we need to create methods to access the list item...

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