Specify each set requested below by listing the elements Giv
     Specify each set requested below by listing the elements.  Give a set A with cardinality 3. Use this set A when answering (b)-(d) below.  Construct a set B in which  Construct a set C in which  Construct a set D so that both   
  
  Solution
Answer:
(a) Let A = { 1, 2, 3 }whose cardinality is 3 .
(b) Let B = { { 1, 2, 3 } , {5 , 7 ,9 } } then A B
(c) Let C = { 1, 2, 3, 4 , 5 , 6 } then every element of A is an element of C which clears that A C.
(d) Let D = { 1, 2, 3 ,{ 1, 2, 3 } , 5 , 7 ,9 } then every element of A is an element of D which clears that A D.
and the set A D

