Which two profile options are required to configure Punchout Catalogs in Self Service Procurement?

In which Functional setup Manager task is Next Purchase Order Number set up?

In an implementation, the Purchase Requisition users are requesting that they want to receive the purchase orders created for their requisitions. Identify the correct functionality related to this requirement in Cloud Procurement:

Identify three attributes that are considered as Reference Data Sets and shared across Business Units in Cloud Procurement.

A supplier has one corporate site location and three other site locations fromwhere they supply goods to your client locations. Each site must have its own contract for negotiating and they must be restricted from viewing each other's negotiations.
How would you configure this?