Write the following as intervals :
$\{ x:x \in R,3\, \le \,x\, \le \,4\} $
Write the following as intervals :
$\{ x:x \in R,0\, \le \,x\, < \,7\} $
Write down all the subsets of the following sets
$\{ 1,2,3\} $
Write the following as intervals :
$\{ x:x \in R, - 12\, < \,x\, < \, - 10\} $
Which of the following is the empty set