I will give thumbs up

The stock has the following returns over the past four years: 15%, -6%, 13%, 7%. What is the standard deviation of stock s returns over this period? (Format your answer to percent, and round to two decimals , enter your answer without % sign. For example, if you get return 0.1234, you will multiply 100 and format to percent, enter 12.34 only) 09.46 O 9.46% 0 9.5 O 0.0946 O 0.095