Louisa, Kristen, and Javier live in the same neighborhood. They created a map showing the locations of their houses on the coordinate plane below. Louisa's house is located at , Kristin's house is located at , and Javier's house is located at . On Saturday morning, they all went for walks to their friends' houses. Louisa left her house and walked 3 blocks north, 5 blocks west, and then 1 block south. Kristen left her house and walked 4 blocks south, 7 blocks east, and 3 blocks north. Javier left his house and walked 9 blocks west, 3 blocks north, and then 4 blocks east.
If each unit of the coordinate plane represents 1 block, how many blocks away from each other were Louisa and Javier when they each finished their walks?