a-1 compute the coefficients of variation.( round the final answer to 2 decimal places.)

I need step by step explanation plus answer.

Ted Fears is highly risk averse, while Sonny Outlook actually enjoys taking a risk. Investments Buy stocks Buy bonds. Buy commodities Buy options Returns: Expected Value $ 7,000 5,000 12,000 8,000 Buy stocks Buy bonds Buy commodities Buy options. Standard Deviation $ 4,000 1,560 15,100 8,850 a-1. Compute the coefficients of variation. (Round the final answers to 2 decimal places.) Coefficient of variation