Write the IUPAC name of the following compounds :

The IUPAC name of the following compound is

The $\mathrm{IUPAC}$ name of the following compound :

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$