The first one belongs to 8 ^2 because 8 is the one being multiplied by itself twice making it the base.
The second one belongs to 2 ^8 because two is being multiplied by itself 8 times.
The third one belongs to 2 ^4 because 2 is multiplied by itself four times.
And the last one belongs to 4 ^2 because four is being multiplied by itself two times.
