Tim Trepid is highly risk-averse while Mike Macho actually enjoys taking a risk. Investments Buy stocks Buy bonds Buy commodity futures Buy options Returns: Expected Value $ 9,590 7,050 23,600 20,000 Standard Deviation $ 5,740 2,900 29,900 16,500 a-1. Compute the coefficients of variation. (Round your answers to 3 decimal places.) Coefficient of Variation Buy stocks Buy bonds Buy commodity futures Buy options a-2. Which one of the following four investments should Tim choose? O Buy bonds O Buy stocks O Buy commodity futures O Buy options b. Which one of the four investments should Mike choose? O Buy bonds O Buy stocks Buy commodity futures Buy options