Since you only have 5 pairs, treat pair 6 as a phantom nonexistent pair. Table 1 N-S is always empty. The pair scheduled to sit at Table 1 E-W has a sit out. The "relay" for round 5 means that the same boards are shared between the two tables in play.
I can answer questions on bidding and on cardplay with the caveat that the former may necessarily involve some subjectivity. I have been playing tournament bridge for over 20 years and I have won several regional tournaments.