Technical Upgrade from SRM 3.0 to SRM 7.0

Hi SRM Gurus

My client wants to do a Technical upgrade from SRM 3.0 to SRM 7.0. Is it possible to do it in one step or first do we need to migrate to SRM 5.0 and then to SRM 7.0?

Also if Functional Upgrade is involved what should be the approach?

For the Migration of the Development Objects from SRM 3.0 to SRM 7.0, is iot possible to proceed by just copying the code from one system to another?

Thanks in advance.

Regards

Manoj