Questions about the summer transfer window

I have heard that Inter Miami is bringing on a new player, so I thought I would ask some questions regarding potential Sounder transfers this summer.

When does the transfer window open?

What area might the Sounders bring in a player?

Which Sounder players might be sold or traded?

Can the Sounders do anything at all with their current DPs? If so, what can they do?

Just asking for a friend.