Installing Exchange 2013 on Server 2012R2 which is a member of 2008 DC?

Hi,

Hope someone can help me.

I'm planning to install Exchange 2013 on Server 2012R2, this is not a DC, its just a member of 2008 DC .

Do i need to upgrade my DC to 2012r2 before installing exchange or is possible to install in the current environment?

I have Exchange 2007 on Windows 2008 DC, plan is to install exchange 2013 on the new 2012R2 server and leave the old server to be just the DC. Exchange will be migrated to the new server.

Thanks!