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In 2015, Caterpillar Inc. had about 652 million shares outstanding. Their book value was $31.3 per share, and the market price was $73.50 per share. The company's balance sheet shows that the company had $21.20 billion of longterm debt, which was currently selling near par value. a. What was Caterpillar's book debt-to-value ratio? (Do not round intermediate calculations. Enter your answer as a decimal rounded to 2 decimal places.) Ratio _ b. What was its market debttovalue ratio? (Do not round intermediate calculations. Enter your answer as a decimal rounded to 2 decimal places.) Ratio _ c. Which measure should you use to calculate the company's cost of capital? 0 Book value 0 Market value