Just type in Premium Outlet Seattle in Google. Click maps, click directions, then click on the bus symbol, this will give you a few different routes, choose the one that suits you best
Not sure about public transport but we commuted using lyft taxi.
No public transport. Have to go by taxi or private tour operator
The buses run there. Have to check community transit for an exact schedule.
Sorry. I have no idea. Maybe you can use the Google map.
Thanks! Your answer is awaiting moderation.