1 How does the implementation of HashSet differ from the implementation of HashDict? 2 Describe a design strategy for the iterator for the class HashSet. 3 Write a constructor method for HashSet that...

1 How does the implementation of HashSet differ from the implementation of HashDict?

2 Describe a design strategy for the iterator for the class HashSet.

3 Write a constructor method for HashSet that expects a collection as an optional parameter. The constructor should copy the items from the collection to the new set.