Following are financial data for Syke and Under Shield.

$ millionsSykeUnder ShieldCurrent Year$1$ Year priorCurrent Year$1$ Year priorNet income$ $3,013$$ $3,105$$ $757$$ $1,455$Net sales$26,30229,46314,93725,796$Total assets$17,83921,19212,09919,753$

Compute return on total assets for the current year for

$($a$)$ Syke and $($b$)$ Under Shield.

Compute both profit margin and total asset turnover for the current year for

$($a$)$ Syke and $($b$)$ Under Shield.

Which company more efficiently used its assets in the current year?