Use Medtronic's income statement and balance sheet to calculate four $(4)$ key financial ratios. One key ratio must come from each of the four key categories: leverage, liquidity, profitability, and efficiency. The four $(4)$ specific ratios selection must come from the following categories.

Leverage Ratios $($Long term debt ratio, Total debt ratio, Debt$-$to$-$equity ratio, Times interest earned ratio, and Cash coverage ratio$)$

Liquidity Ratios $($Net working capital to total assets ratio, current ratio, quick ratio, and cash ratio$)$

Efficiency Ratios $($Asset turnover ratio, average collection period, inventory turnover ratio, and Days sales outstanding$)$

Profitability Ratios $($Net Profit Margin, Return on Assets, and Return on Equity$)$