Hi, I am working on this excercise and I need some help. Please show me the formulas... Thank you

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 Operating assets $56,535 $51,447 54,368 38,819 110,903 90,266 19,847 18,722 41,958 24,097 Total liabilities 61,805 42,819 Total Oracle stockholders' equity 48,663 46,878 Total revenues 38,226 Operating income before tax 13,871 Nonoperating assets Total assets Operating liabilities Nonoperating liabilities Nonoperating expense before tax 1,037 Tax expense 2,896 Net income 9,938 a. Compute return on equity (ROE) Round answer to two decimal places (ex: 0.12345 = 12.35%) Answer % b. Compute return on net assets (ROA) Round answers to two decimal places (percentage ex: 0.12345 = 12.35%) Answer % c. Compute return on net operating assets (RNOA) Round answers to two decimal places (percentage ex: 0.12345 = 12.35%) Answer %