Below are the stock returns for the past five years for Agnew Industries: Year 2003 2002 2001 2000 1999 13% 7% -5% 1% 11% What was the stock returns' standard deviation during this five-year period? Select one: O a. 5.4090 b. 1.63 . 0.79% d. 7.40% e. 1.37