1d: Using the ratios below, appraise the trend (2007-09) of Flash's profitability. Fill out the table and write your brief analysis below.
	2007	2008	2009	TREND
Gross margin	18.9%	15.5%	18.9%	0.0%
Net profit margin	2.9%	0.2%	2.8%	-3.4%
Return on sales	5.6%	1.1%	5.5%	-1.8%
Return on total assets	8.1%	0.4%	7.1%	-12.3%
Return on equity (ROE)	13.3%	0.8%	12.7%	-4.5%
Return on invested capital (ROIC)	9.2%	1.7%	8.5%	-7.6%