ARCS Archive and purge implementation questions on batch size, unarchive and epmautomate

Hello Team,

We're in process of using archive and purge functionality via epmautomate command. We referred this link and have below questions on few points:

https://docs.oracle.com/en/cloud/saas/account-reconcile-cloud/adarc/admin_perform_archive_tm.html#GUID-CADF2356-236B-49DA-A15D-5D3674575840

If the Archive job is taking longer than expected, or is interrupted by the AMW, the status of the Archive job is set to Aborted. You must first unmark transactions that were part of this Archive job and then submit a new job to archive the matched transactions.

1. How can we unarchive a transaction and Let's say we don't unarchive, will it be still considered while purge.