Connecting old E228WFP Dell 22" monitor to new XPS 8900

Hi,

What cable do I need to connect my old E228WFP Dell 22" monitor to my new XPS 8900 PC?  The monitor has 15 & 24 pin female connections and the PC has HDMI and DisplayPort connections connection.  And one 24 pin female connection for which I'm not sure the purpose.  Excuse my ignorance...

Thanks...