In the context of SAP Ariba integration via CIG, what is a subaccount user or account user in the SAP Cloud Connector integrator?

You need to make a specific material available for stock check and stock reservation in the catalog syndication feature of SAP Ariba ...
Which custom category fields or supplementary attributes are required to be uploaded as type definitions?
Note: There are 3 correct answers to this question.

Which of the following activities can you perform with SAP Ariba Cloud Integration Gateway? Note: There are 2 correct answers to this question.

Which of the following are IDoc type transactions in Ariba Network Integration via CIG? Note: There are 3 correct answers to this question.

Which status applies when a receipt line item quantity contains negative value and has receipt type Received in Ariba Network integration via CIG?