[问答题]
Consider the followi+wd.sgp n;5r ut5q* evs7l.t+ecu m j/ng Venn diagrams.
1. Write down an expression, in set notation, for the shaded region represented by
(1) Diagram 1;
(2) Diagram 2;
(3) Diagram 3.
2. Shade on the Venn diagrams the regions represented by the sets
(1) $A^{\prime} \cup B$ ;
