Barbie raises her hand. "Yes, Barbie?" asks Ms. Smith, the teacher. "If the first bit is the checksum, doesn't that make examples 3, 5, and 6 incorrect? " asks Barbie.

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      Barbie raises her hand. "Yes, Barbie?" asks Ms. Smith, the teacher. "If the first bit is the checksum, doesn't that make examples 3, 5, and 6 incorrect? " asks Barbie.