Confused: Occlusal view of mand 1st and 2nd pm

[Comet208]

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I am a little confused and was hoping someone would clarify this for me.
According to the decks, Occlusal views of mand 1st and 2nd premolars are respectively diamond shaped and square. According to the released exam (part 1, 98), 1st pm is rhomboidal and the 2nd is pentagon.

so, for board purposes, what are they??