Required a. Compute the profit margin (PM) and gross profit margin (GPM) ratios for each company. (As a British company, GlaxoSmithKline plc has a statutory tax rate of 26.5\% in 2014; assume a statute rate of 35% for all other companies.) (Round your answers to one decimal place.) b. Compute the research and development (R\&D) expense to sales ratio and the selling, general and administrative (SG\&A) expense to sales ratio for each company. (Round your answers to one decimal place.)