As it's written, the answer to the first one is really 4. Simply being different from the teammmates isn't enough, as contrast has to be present. Shorts have to be the same color, and black/white has never been part of the requirement.
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Felix A. Madera
USAV Indoor National / Beach Zonal Referee
FIVB Qualified International Scorer
PAVO National Referee / Certified Line Judge/Scorer
WIAA/IHSA Volleyball Referee
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