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7. Eyedropper
Select the rest of the unfilled paths, use the Eyedropper tool and click on the top layer to copy the gradient fill. To get the best result, you might need to use the Gradient Tool to adjust the gradient position of each shape.

8. Icon Base
Make a rectangle box and then apply 25pt round corner (Effect > Stylize > Round Corners).

9. Drop Shadow
Now go to Effect > Stylize > Drop Shadow and apply the following setting:

