See Example 2.
Problems 29, 31, 34, 41, and 43
These are unions; to find the union of two sets first list all of the elements in the
given sets using rosters, and then select those elements that are in either of
the given sets.
Problems 30, 32, 33, 42 and 44
These are intersections; to find the intersection of two sets first list all of
the elements in the given sets using rosters, and then select those elmeents that
are in both of the given sets.
Problems 35-40
These are complements; remember, complement is relative to the universe.
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