"Rank the following three stocks by their level of total risk, highest to lowest Rail Haul has an average return of 8% and standard deviation of 10%, the average return and standard deviation of Idol Staff are 10% and 20% and of Poker-R-Us are 6% and 15% "Idol Staff Rail Haul Poker-R-Us "Idol Staff Poker-R-Us, Rail Haul "Rail Haul. Poker-R-Us Idol Staff "Poker-R-Us Idol Staff. Rail Haul" Not possible to determine with the data provided All have equivalent risk