[问答题]
Consider the following Venn d* ir;j*d syti,kd +ecy1,b0l hiagrams,qw f4h pel+wf+x:+pc .
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) $A^{\prime} \cup B$ ;
