Tim Trepid is highly risk-averse while Mike Macho actually enjoys taking a risk. Investments Returns: Expected Value Standard Deviation Buy stocks $ 8,820 $ 6,010 Buy bonds 7,590 2,220 Buy commodity futures 25,600 25,600 Buy options 19,500 17,200 a-1. Compute the coefficients of variation. (Round your answers to 3 decimal places.) 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