Select all the rectangles and Join them (Arrange > Join).Select the Joined rectangles and the O-shape and Combine Shapes > Subtract Shapes (Arrange menu).This operation will remove the portion of the rectangles that were overlapping the O-shape. (It also removes the rectangles).
Select the Joined rectangles and the O-shape and Combine Shapes > Subtract Shapes (Arrange menu).
This operation will remove the portion of the rectangles that were overlapping the O-shape. (It also removes the rectangles).
Using the Ellipse Tool , create a 20 pixel diameter circle. Center align it vertically with the O-shape and between the sides of the O-shape.Drag and duplicate three more circles as shown.
Drag and duplicate three more circles as shown.