workflows - sharepoint 2010 infopath form published in a document library

Hi Friends,

For a SharePoint 2010 workflow, what are the MINIMUM permissions levels required for -->

Create workflow (from SPD/Infopath designer),

Publish workflow (from SPD/Infopath designer),

Initiate a workflow manually,

terminate a workflow manually,

Approve/Reject a task.

Re-assign a task.

Rgds, Minesh