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$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$ Law Specialists, Ine.
$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$ Selected financial information
$\begin{array}{l}\begin{array}{rrrrr}&2010 & 2011 & 2012 & 2013 & 2014 \\\hline\text { Profit margin \( (\%) \)}&6.89 & 4.94 & 0.11 & 0.32 & 5.25 \\\text { Retention ratio \( (\%) \)}&100.00 & 100.00 & 100.00 & 100.00 & 78.27 \\\text { Asset turnover \( (\mathrm{X} \) )}&2.78 & 2.47 & 2.03 & 2.00 & 2.23 \\\text { Financial leverage \( (\mathrm{X}) \)}&1.69 & 1.38 & 1.16 & 1.32 & 1.52 \\\text { Growth rate in sales \( (\%) \)}&22.89 & -10.05 & -28.76 & 3.55 & 26.19 \\\hline\end{array}\end{array}$

-Use Law Specialists's selected financial information above to answer the following questions:
a.Calculate Law Specialists's sustainable growth rate in each year.b.Comparing the company's sustainable growth rate with its actual growth rate in sales,what growth problems did the company face over this period?