Tim Trepid is highly risk-averse while Mike Macho actually enjoys taking a risk. Standard Deviation $ 5,820 2,880 22,700 18,200 Returns Expected Value Investments $9,750 7,280 Buy stocks Buy bonds Buy commodity futures Buy options 23,500 20,300 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? Buy bonds Buy stocks Buy commodity futures Buy options b. Which one of the four investments should Mike choose? Buy bonds Buy stocks Buy commodity futures Buy options