<image>As shown in the image, pieces are arranged to form the character "上":

The first "上" character ____ the second "上" character ___ the third "上" character.

If we continue following the pattern, we can observe:
(1) The fourth and fifth "上" characters require ____ and ____ pieces respectively.
(2) The nth "上" character requires ____ pieces.
(3) If a certain figure has a total of 102 pieces, do you know which "上" character it is?