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1. In Lab 6, the List class used dummy headers at the beginning of
the linked list. Will you use dummy headers for each row or column
of a ZoomTable? If so, how many (1 or 2) and how can you tell when
a Node pointer is pointing to a dummy?  If no dummy headers will
be used, why not?



2. How will your ZoomTable constructor initialize the linked lists
for each row and or column? What, if any, items need to be dynamically
allocated?



3. Suppose that you locate the insertion point for a Node in a
ZoomTable starting at smaller index values to larger ones.  When
you copy an entire ZoomTable in the copy constructor, should you
copy nodes with larger indices first? or smaller indices first?
Why would this make a difference?