Payment for multiple OUs

We want to create a payment process request for invoices belonging to multiple operating units. We are in 12.1.3 instance. What ae the pre-requisites to achieve the same e,g, MOAC etc? A few more specific questions are:

1. Do we need to enable MOAC?

2. Can we create one payment instraction file for all the payments belonging to multiple OUs? What's the setup?

3. Can we create separate payment instruction files for each OU?

4. Can we use one bank account for funds disbursement for all the OUs if Organization access for all the OUs is given to the bank account?

5. Can the OUs belong to different ledgers and still we can make the payment. I understand this might not be possible as the same bank account may not be used by OUs belonging to different ledgers - just confirming.