Question: A set is like a bag, except that a set does not allow multiple copies of any element. If you try to insert a new copy of an item that is already present in a set, then the set simply remains unchanged.
For this project, implement a set as a new class that is derived from one of your bags.
Your implementation should override only the insert member function.
The code must be compile and error free correctly on first attempt. If you add comments in code you would be appreciated.