The box-and-whisker plot below represents some data set. What is the value of the first quartile?

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It is not possible to determine the value of the first quartile from the box-and-whisker plot provided. A box-and-whisker plot displays the minimum value, first quartile, median, third quartile, and maximum value of a dataset. The first quartile is the value that divides the lower 25% of the data from the upper 75% of the data. Without additional information or data points, we cannot determine the exact value of the first quartile.