Draw appropriate Venn diagram for each of the following:

$A^{\prime} \cup B^{\prime}$

Taking the set of natural numbers as the universal set, write down the complements of the following sets:

$\{ x:x$ is a perfect square $\} $

Taking the set of natural numbers as the universal set, write down the complements of the following sets:

$\{ x:x \in N$ and $2x + 1\, > \,10\} $

Draw appropriate Venn diagram for each of the following:

$(A \cap B)^{\prime}$

Fill in the blanks to make each of the following a true statement :

$A \cap A^{\prime}=\ldots$