The correct answer for 1 is They both work together as economic partners, and they both share cultures, especially along the border. There are many trade agreements between them and there's the famous texmex culture and kitchen found along the border.
The answer for 2 is
The Netherlands: Early to settle but ended up with the least land of the five colonial powers
France : Dominated northeastern North America
Spain : Ruled west of the line of demarcation
Portugal : Ruled east of the line of demarcation