Write the following as intervals :
$\{ x:x \in R, - 4\, < \,x\, \le \,6\} $
Which of the following are examples of the null set
$\{ y:y$ is a point common to any two parallellines $\} $
Examine whether the following statements are true or false :
$\{a\} \subset\{a, b, c\}$
Make correct statements by filling in the symbols $\subset$ or $ \not\subset $ in the blank spaces:
$\{ x:x$ is an even natural mumber $\} \ldots \{ x:x$ is an integer $\} $
State which of the following sets are finite or infinite :
$\{ x:x \in N$ and $x$ is prime $\} $