Calculate these profitability measures for 2021 . Show each computation. a. Rate of return on sales. b. Asset turnover ratio. c. Rate of return on total assets. d. Leverage (equity multiplier) ratio. e. Rate of return on common stockholders' equity. f. Is Isaacson's profitability strong, medium, or weak? Statements or income (Adapted) Year Ended December 31, 2021 and 2020 \begin{tabular}{lrrr} \hline (Dollar amounts in millions) & \multicolumn{2}{r}{2021} & \multicolumn{2}{c}{2020} \\ \hline Net revenues & $ & 8,330 & $,250 \\ Cost of goods sold & 2,670 & 5,100 \\ Gross profit & 5,660 & 4,150 \\ General and administrative expenses & 3,400 & 3,600 \\ Income from operations & 2,260 & 550 \\ Interest expense, net & 565 & 110 \\ Income before income taxes & 1,695 & 440 \\ \cline { 3 - 4 } \end{tabular} Provision for income taxes Net income \begin{tabular}{lll} & 862 & 200 \\ \cline { 2 - 2 } & 833 & 240 \\ \hline \hline \end{tabular} Balance Sheet (Adpated) December 31, 2021 and 2020 Increase (Decrease) (Dollar amounts in millions) 2021 2020 Liabilities and Stockholders' Equity Current liabilities: Accounts payable Income tax payable Short-term debt Other \begin{tabular}{rrrc} $930$ & 850$ & 80 & 9.4% \\ 30 & 85 & (55) & (64.7) \\ 160 & 95 & 65 & 68.4 \\ 60 & 65 & (5) & (7.7) \\ \hline \end{tabular} Total stockholders' equity Total liabilities and stockholders' equity Assets Current assets: Cash and cash equivalents Short-term investments Receivables, net Inventories \begin{tabular}{rrrr} $1,240$ & 950$ & 290 & 30.5% \\ 25 & 55 & (30) & (54.5) \\ 200 & 290 & (90) & (31.0) \\ 128 & 50 & 78 & 156.0 \\ 254 & 302 & (48) & (15.9) \\ \hline 1,847 & 1,647 & 200 & 12.1 \\ \hline 3,036 & 3,034 & 2 & 0.1 \\ 1,050 & 858 & 192 & 22.4 \end{tabular} Other assets Total assets