To find the union of the two sets simply write all of the elements together into one big set. Remove any duplicate entries (if there are any).
[tex]A \cup B = \{x,y,z,a,b,c\}[/tex]
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The intersection of the two sets A and B is the set of elements that are in BOTH sets. In this case, there is no overlap so we have
[tex]A \cap B = \{ \} = \varnothing [/tex]
which is a way of saying "the empty set"
