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 $9,140, $7,940, $21,600, $13,700; Standard Deviation $6,300, $2,500, $26,000, $19,700. a1. Compute the coefficients of variation. Round your answers to 3 decimal places. a2. 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 options -Buy commodity futures