Surface Interval Questions

1.    A group D diver is out of the water for 2 hours.  What is her new group?
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2.    A group G diver is out of the water for 1 hour.  What is her new group?
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3.    A group F diver is out of the water for 30 minutes.  What is her new group?
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4.    A group I diver is out of the water for 9 hours.  What is her new group?
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