Some images in various formats. Guess which each is!

<img src="jpg.jpg" width="119" height="88" />
<img src="png.png" width="116" height="87" />
<img src="gif.gif" width="118" height="88" />
<object width="120" height="90" data="svg.svg"  type="image/svg+xml">
No plug in
</object>