Got 5.2, just making sure I didn't get it wrong

Consider the following returns and states of the economy for Neptune Corporation: Economy Probability Return Weak 15% -9% Normal 50% 3% Strong 35% 7% What is the standard deviation of the hrm's returns? SET YOUR CALCULATOR TO FOUR DECIMAL PLACES AND ROUND TO 2 DECIMAL PLACES AT THE END DO NOT ENTER THE %. FOR EXAMPLE, IF YOUR ANSWER IS 77011% ENTER IT AS 770