What sequence indicates that the tallest child is in the middle of a line of five?

1, 2, 1, 0, 0

0, 1, 2, 1, 0

1, 1, 0, 1, 1

2, 2, 2, 2, 2

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What does the number '1' indicate about a child in line?

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If a child at the end of a line says '0', what does that mean?

Q3.

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