upgrade path from vCenter 5.0 to 5.5 or 6.5

Hi All,

I have a vcenter 5.0 based on windows 2008 and there is a requirement to upgrade 5.0 to 5.5.. Can we upgrade directly to 6.0 or 6.5 ?

Hardware Dell Power edge R900 & R720

Any insight into this will be much appreciated.

Thanks

vmk