[问答题]
Consider the followib g1 bt tu7t.u-9pid6xyjxrd:0 *l)dang Ve al)4c-etnu9)pss i7t +. mfifnn 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) $A^{\prime} \cup B$ ;
