Examine whether the following statements are true or false :

$\{ a,e\}  \subset \{ x:x$ is a vowelin the English alphabet $\} $

Let $A=\{a, e, i, o, u\}$ and $B=\{a, b, c, d\} .$ Is $A$ a subset of $B ?$ No. (Why?). Is $B$ a subset of $A ?$ No. (Why?)

Write down all the subsets of the following sets

$\{ a,b\} $

Write the following as intervals :

$\{ x:x \in R, - 12\, < \,x\, < \, - 10\} $

Write the following sets in the set-builder form :

$\{ 1,4,9 \ldots 100\} $

Write the following as intervals :

 $\{ x:x \in R, - 4\, < \,x\, \le \,6\} $