15.9 PROGRAM 7: SortedSet class
Implement a SortedSet class that is a specialization of theIntList class you implemented for PROGRAM 5.
IntList class
The only change to the IntList class from PROGRAM 5 is to changethe access privileges of the data fields from private to protected.You may not change or add anything else to the IntList class. Ifyou did not get 100% on the IntList class, you should fix thisclass first so that you do get 100% on it before going on to theSortedSet class.
SortedSet class
A set is a collection of unique values. That is, a listthat does not have any duplicates. In
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