1)

You can extract the images from the PDF Document by doing the following:

Open up the PDF Document

Go to Tools > Basic > Snapshot Tool

You can now drag your mouse around the image in the PDF document as to select the entire image (place a box around the image)

You should now receive a message that says "The selected area has been copied to the Clipboard"

2)

Open up Microsoft Paint (Start > Programs > Accessories > Paint). 
 
Then, paste the image that you previously copied from the PDF Document using the Snapshot Tool.  You can also use the keyboard shortcut - CTRL + V to paste the image into Microsoft Paint.
 
You can now resize the image if you need to, by clicking on any of the small square boxes surrounding the image and dragging it down to size.
 
At this point, go to "File > Save As" and browse to a location on your computer where you would like to save the new file to.  Now, type in a file name for the new file or leave the file name that is already there, and in the "Save as type" box, select "JPEG" from the drop-down box. 
 
Finally, click on "Save".  This should convert the image to a JPEG (.jpg) format.