hi! from the attached spreadsheet I need the following:

Using the Consolidated Statements of Operations and the excerpts from the Logitech International S.A. Form 10-K, analyze the profitability of Logitech. Your analysis should include the following calculations for all three years: (a) Common-size income statements. (b) Effective tax rates. (c) Growth rates of sales and total operating costs. Your written analysis and interpretation should include explanations for why trends have occurred. Fraser, Lyn M.; Ormiston, Aileen (2015-01-05). Understanding Financial Statements (Page 153). Pearson Education. Kindle Edition.

net sales cost of goods sold gross profit operating expenses: marketing and selling research and development General and administrative Impairment of goodwill and other assets Restructuring charges Total operating expenses Operating income (loss) Interest income,net Other income (expense), net Income (loss) before income taxes Provision for (benefit from) income taxes Net income (loss) Net income (loss) per share: Basic Diluted Shares used to compute net income (loss) per share Basic Diluted Cash Dividends per share 2013 2099883 1392581 707302 2012 100.0% 2316203 66.3% 1529614 33.7% 776589 431598 153922 113824 216688 43704 959736 -252,434 907 -2198 -253725 -25588 -228137 20.6% 7.3% 5.4% 10.3% 2.1% 45.7% -12.0% 0.0% -0.1% -12.1% -1.2% -10.9% 423854 162331 118423 704608 71981 2674 16622 91277 19819 71458 2011 100.0% 2362886 66.0% 1526380 33.5% 836506 18.3% 7.0% 5.1% 0.0% 0.0% 30.4% 3.1% 0.1% 0.7% 3.9% 0.9% 3.1% 420580 156390 116880 693850 142656 2316 3476 148448 19988 128460 -1.44 -1.44 0.41 0.41 0.73 0.72 158468 158468 0.85 174648 175591 176928 178890 100.0% 64.6% 35.4% 17.8% 6.6% 4.9% 0.0% 0.0% 29.4% 6.0% 0.1% 0.1% 6.3% 0.8% 5.4%