Halliburton and Schlumberger compete in the oil field services sector. Refer to the following $2018$ financial data for the two companies to answer the requirements.$ millionsTotal revenuePretax net nonoperating expenseNet incomeAverage operating assetsAverage operating liabilitiesMaa. Compute return on net operating assets $($RNOA$)$ for each company.b$.$ Disaggregate RNOA into net operating profit margin $($NOPM$)$ and net operating asset turnover $($NOAT$)$ for each company.Do not round until your final answer. Round answers to two decimal places $($percentage example: $0\mathrm{.}12345=12\mathrm{.}35\%).$