The numbers of trading cards owned by 9 middle-school students are given below. (Note that these are already ordered from least to greatest.)
\[
410,470,479,523,529,531,550,596,664
\]
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Suppose that the number 410 from this list changes to 527 . Answer the following.
\begin{tabular}{|l|l|}
\hline (a) What happens to the median? & It decreases by \( \square \). \\
& It increases by \( \square \) \\
& It stays the same. \\
\hline (b) What happens to the mean? & It decreases by \( \square \) \\
& It increases by \\
& It stays the same. \\
\hline
\end{tabular}