Compute and Interpret Ratios Selected balance sheet and income statement information from Illinois Tool Works follows. $ millions 2019 2018 2017 Net operating profit after tax (NOPAT). Net income Total assets Equity Net operating assets (NOA) Treasury stock $ 2,610 $ 2,711 2,521 2,563 15,068 14,870 $16,780 3,026 3,254 3,254 8,869 9,462 10,089 18,982 17,545 15,562 Required a. Compute profitability measures: RNOA, ROA and ROE for 2019 and 2018 using the numbers as reported by the company. b. Adjust equity and total assets for the amount of treasury stock. Using these restated numbers, recom- pute RNOA, ROA and ROE for both years. c. Which profitability measures (from part a or part b) better reflect the company's profit levels during the two years? Of the three measures, which one is least influenced by the company's stock repurchase activity? Explain