A couple questions about the use of assets and asset stores:

1. If I create an asset that is my own work and include it in a Skyrim mod, am I able to sell that asset on an asset store or does including the asset in a Skyrim mod that's available for download automatically make it the property of Zenimax?
   
2. Am I allowed to include assets that I've bought from an asset store in a Skyrim mod assuming I have permission (and I do) from the asset creator?

In both cases the asset in question is not derived from any existing Skyrim (or any other licensed game) models or textures. They are built from scratch either by myself or by another 3D artist.

The mod containing the asset(s) will naturally be free.