Final answer:
The due date for the payment of 'REIX' cannot be determined without additional context, as 'REIX' is not a standard term with a universally recognized payment schedule.
Step-by-step explanation:
The question appears to be in relation to a specific payment date for what is likely a financial instrument, fee, or similar transaction denoted by 'REIX'. Without additional context, it is not possible to determine the correct due date for this payment as 'REIX' does not correspond to a widely recognized financial term or payment that can be definitively associated with a standard due date.
'REIX' could potentially be an abbreviation or code specific to a particular institution or course. Therefore, one would need to refer to the course material, official documentation, or financial calendar of the institution or entity related to 'REIX' to determine when the payment is due. It is also possible that 'REIX' is a typo or an acronym for a real estate investment exchange or trust, but this is speculation without further context.