To begin:
The following cutaway image shows the results of the shell operation. The cut is not part of the model.
Notice that the part icon in the browser changed to represent a multi-body part. The Solid Bodies folder contains two bodies. You can right-click each body and select Properties from the context menu to set visibility or appearance.
Before proceeding, expand the Surface Bodies folder. and turn off the visible surface.
Save the file as PFTutorial_1.