Molson Coors Brewing Company reported the following selected data at December 31, 2011 (in US$ millions):

Total assets...........................................$12,423.8

Total liabilities..........................................4,733.6

Interest expense..........................................118.7

Income tax expense........................................99.4

Profit.......................................................677.1

Calculate the company's

(a) Debt to total assets, and

(b) Interest coverage ratios.