Please help with question b.

\begin{tabular}{|c|c|c|} \hline \multicolumn{3}{|l|}{\begin{tabular}{c} FACEBOOK INC. \\ Consolidated Balance Sheet \end{tabular}} \\ \hline At December 31, \$ millions & 2018 & 2017 \\ \hline \multicolumn{3}{|l|}{ Current assets } \\ \hline Cash and cash equivalents & $10,019 & $8,079 \\ \hline Marketable securities & 31,095 & 33,632 \\ \hline Accounts receivable, net & 7,587 & 5,832 \\ \hline Prepaid expenses and other current assets & 1,779 & 1,020 \\ \hline Total current assets & 50,480 & 48,563 \\ \hline Property and equipment, net & 24,683 & 13,721 \\ \hline Intangible assets, net & 1,294 & 1,884 \\ \hline Goodwill & 18,301 & 18,221 \\ \hline Other assets & 2,576 & 2,135 \\ \hline Total assets & $97,334 & $84,524 \\ \hline \multicolumn{3}{|l|}{ Current liabilities } \\ \hline Accounts payable & $820 & $380 \\ \hline Partners payable & 541 & 390 \\ \hline Accrued expenses and other current liabilities & 5,509 & 2,892 \\ \hline Deferred revenue and deposits & 147 & 98 \\ \hline Total current liabilities & 7,017 & 3,760 \\ \hline Other liabilities & 6,190 & 6,417 \\ \hline Total liabilities & 13,207 & 10,177 \\ \hline \multicolumn{3}{|l|}{ Stockholders' equity } \\ \hline Common stock and additional paid-in capital & 42,906 & 40,584 \\ \hline Accumulated other comprehensive loss & (760) & (227) \\ \hline Retained earnings & 41,981 & 33,990 \\ \hline Total stockholders' equity & 84,127 & 74,347 \\ \hline Total liabilities and stockholders' equity & $97,334 & $84,524 \\ \hline Combined federal and state statutory tax rate & 22.00% & \\ \hline RNOA & 57.54% & \\ \hline \end{tabular} Compute ROE and Nonoperating Return with Negative NNO and No Noncontrolling Interest Refer to the balance sheets and income statement below for Facebook Inc. b. Compute net nonoperating obligations (NNO) for 2018 and 2017, net nonoperating expense (NNE), and the NNE as a percentage of NNO (NNEP), assuming a 22%6 statutory tax rate