Computing and Interpreting Financial Statement Ratios Following are selected ratios of Norfolk Southern for 2018 and 2017. Return on Assets (ROA) Component 2018 2017 Profitability (Net income/Sales) 27.3% 55.2% Productivity (Sales/Average assets) 0.358 0.339 a. Was the company profitable in 2018? No x b. Was the company more profitable in 2018 or 2017? 2017 c. Is the change in productivity a positive or negative development? Negative x d. Compute the company's ROA for 2018 and for 2017. Note: Round answers to one decimal places (example: 10.4%). 2018 2017 ROA 18.7% x 9.8% x e. From the information provided, which of the following best explains the change in ROA during 2018? 1. The company's profitability weakened considerably.