[问答题]
Consider the following Venn diagramtvvicz,3sz t n)40y:e s to5j/x8di6f b.
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) $A^{\prime} \cup B$ ;
