Explanation

Box 1: Yes
In the first exhibit, "Allow invitations to be sent to any domain (most inclusive) is enabled". Also, everyone is allowed to 'invite'. The Target Domains setting will have no effect. This would only apply if one of the Allow/Deny invitations to the specified domain options were selected.
There is a restriction that blocks invitations being sent to contoso.com. However, this restriction does not apply to Fabrikam.com. Therefore, you can share the files in Collection1 to [email protected].
Box 2: Yes
As noted above, external sharing is enabled for any domain except contoso.com. The Target Domains setting in the first exhibit will have no effect. Therefore, you can share Collection1 to [email protected].
Box 3: Yes
As noted above, external sharing is enabled for any domain except contoso.com. Blocking sharing to contoso.com does not block sharing to us.contoso.com. Therefore, you can share Collection1 to [email protected].
Reference:
https://docs.microsoft.com/en-us/sharepoint/turn-external-sharing-on-or-off