Which wallpaper group is depicted in the image?

Image 1

Image 1

Image 2

Image 2

Image 3 (Note: Assume that colors don't matter)

Image 3

Image 4

Image 4

Image 5 (Note: Assume that colors don't matter)

Image 5

Image 6

Image 6

Image 7 (Note: Assume that colors matter)

Image 7