a. Compute net operating profit after tax (NOPAT) for 2018 . Assume that the combined federal and state statutory tax rate is 22%. a. Compute net operating profit after tax (NOPAn) for 2018. Assume that the combined federal and state statutory tax. cate is 22%. b. Compute net operating assets (NOA) for 2018 and 2017 . Analysis and Interpretation of Profitability Balance sheets and income statements for 3M Company follow. +RNOA may be different from first RNOA calculation due to rounding d. Compute net nonoperating obligations (NNO) for 2018 and 2017 . Confirm the relation: NOA = NNO + Total equity Compute return on equity (ROE) for 2018 . f. What is the nonoperating return component of ROE for 2018 ? Plesse answer all parts of the