Western World Has the Following Selected Data ($ in Millions)

Western World has the following selected data ($ in millions):
$\begin{array}{lrr}\text { Balance Sheet Data }&2012&2011\\\text { Total Assets } & \mathbf{\$ 2 , 5 1 1} & \mathbf{\$ 2 , 3 1 5} \\\text { Total Liabilities } & 1,685 & 1,525 \\\text { Total Stockholders' Equity } & 826 & 790\end{array}$

$\begin{array}{lr}\text { Income Statement Data }\\\text { Sales } & \$ 786 \\\text { Interest Expense } & 77 \\\text { Tax Expense } & 32 \\\text { Net Income } & 80\end{array}$
Based on these amounts,calculate the following ratios for Western World in 2012:
1.Debt to equity ratio.
2.Return on assets ratio.
3.Return on equity ratio.
4.Times interest earned ratio.