Computing and Interpreting Financial Statement Ratios Following are selected ratios of Norfolk Southern for 2018 and 2017. a. Was the company profitable in \\( 2018 ? \\) b. Was the company more profitable in 2018 or \\( 2017 ? \\) c. Is the change in productivity a positive or negative development? d. Compute the company's ROA for 2018 and for 2017. Note: Round answers to one decimal places (example: \10.4 ). e. From the information provided, which of the following best explains the change in ROA during \\( 2018 ? \\)