Upgrade five Drupal 8.x websites to 9.2

I run a small hosting business in Nova Scotia, Canada, mainly for local non-profits/charities.
I need five Drupal websites updated, then upgraded to Drupal 9.2.
(because Drupal 8.9 will no longer be supported after Nov '21)

They are:-
RMCe 8.8.2

RMCf 8.7.3

AcP 8.9.6

LST 8.5.3
ROTB 8.7.8

Thanks,
Alex