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Below are the distances that each of Davi the Dragon Keeper's four dragons can blow fire (in meters). A rectangle made up by four identical rectangles. They make up $4$ columns and $1$ row. The row values are as follows: $\frac{9}{10}$, $\frac{1}{2}$, $\frac{3}{10}$, $1$ and $\frac{1}{10}$. A rectangle made up by four identical rectangles. They make up $4$ columns and $1$ row. The row values are as follows: $\frac{9}{10}$, $\frac{1}{2}$, $\frac{3}{10}$, $1$ and $\frac{1}{10}$. Find the mean absolute deviation (MAD) of the data set.