Dynamics 365 2MT Episode 28: Using wait conditions to send out reminders in Dynamics 365

[@gkilpatrick5053]

I'm trying to create workflow(s) which wait until 28 days, 14 days then 7 days before an event and then sends different emails at each stage and changes a custom entity (table) Status field. Does this need to be three workflows which all fire at the change of field or can I do this in one?