State whether each of the following set is finite or infinite :

The set of lines which are parallel to the $x\,-$ axis

Write the following sets in roster form :

$B = \{ x:x$ is a natural number less than ${\rm{ }}6\} $

Consider the sets

$\phi, A=\{1,3\}, B=\{1,5,9\}, C=\{1,3,5,7,9\}$

Insert the symbol $\subset$ or $ \not\subset $ between each of the following pair of sets:

$A, \ldots B$

Let $S = \{ 0,\,1,\,5,\,4,\,7\} $. Then the total number of subsets of $S$ is

Write the following as intervals :

$\{ x:x \in R,3\, \le \,x\, \le \,4\} $

Write the following sets in the set-builder form :

${\rm{\{ 2,4,8,16,32\} }}$