Please help me compute the return on Net Operating Assets using the equation: RNOA = NOPAT / Average NOA

Compute and Compare ROE, ROA, and RNOA Selected balance sheet and income statement information for Oracle Corporation follows. (Perform the required computations from the perspective of an Oracle shareholder. $ millions May 31, 2015 May 31, 2014 $57,002 Operating assets $62,090 54,368 38,819 Nonoperating assets 95,821 Total assets 116,458 19,055 Operating liabilities 20,180 24,097 41,958 Nonoperating liabilities 62,138 43,152 Total liabilities 54,320 Total Oracle stockholders' equity 52,669 38,559 Total revenues 13,993 Operating income before tax 1,037 Non operating expense before tax 3,498 lax expense Net income 9,458 a. Compute return on equity (ROE) Round answer to two decimal places (ex: 0.12345-12.35%) 17.68 b. Compute return on net assets (ROA) Round answers to two decimal places (percentage ex: 0.12345 12.3596) 8.91 c. Compute return on net operating assets (RNOA) Round answers to two decimal places (percentage ex: 0.12345 12.3596)