Step 3:

The side with bars 10 & 11 went down therefore either 9 is light or either 10 or 11 is heavy.

Place bar 10 on the left and 11 on the right then click the appropriate picture.

 

                 Click here if the 1 to 4 side goes down                   Click here if it balances               Click here if bars 5 to 8 go down