Suppose in its $2022$ annual report that McDonald's Corporation reports beginning total assets of $$20$ billion, ending total assets of $$20$ billion, net sales of $$21$ billion, and net income of $$5$ billion.

$($a$)$ Compute McDonald's return on assets. $($Round return on assets to $2$ decimal places, e$.$g$.5\mathrm{.}12\%.)$

McDonald's return on assets $\%$

$($b$)$ Compute McDonald's asset turnover. $($Round asset turnover to $2$ decimal places, e$.$g$.5\mathrm{.}12.)$

McDonald's asset turnover times