Where do you define a fixed vendor for a specific period in time?

Which assignments can be made for the organizational object Purchasing Organization?
There are 2 correct answers to this question.
Response:

Before deliveries arrive from certain vendors, you want to be informed of the delivery date
and quantity. To do this, you use a confirmation control key.
Which of the following settings can you define in a confirmation control key?
Please choose the correct answer.
Response:

You set up the document overview in the Enjoy SAP purchase order (transaction ME21N). What setting allows you to sort documents by vendor first and then by document number within a vendor?
Please choose the correct answer.
Response:

You post a goods receipt for a purchase order item. The material has the material type NLAG (non-stock material).
What are the effects? (Choose two)