What cable /lead would I need to connect my ipad 2 to an elmo document camera so the image can be viewed on screen?

I have an elmo document camera and would like to be able to show the image on my ipad2 on the whiteboard, which is connected via the document camera. Is there any way to get sound as well?

Apple 30-pin to VGA Adapter

Apple 30-pin to VGA Adapter

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