Should JPA be part of EJB Module and/or Web Module in a Eclipse Enterprise Project?

I am working on Java 1.6. The application server is JBoss 5.0. I am using Eclipse Kepler.

In Eclipse I create a new Enterprise Application Project (EAR Application Project) by selecting File --> New --> Enterprise Application Project. I name it MyApp.

I selected it to have 2 modules:
1) EJB Module (I call it MyAppEJB)
2) Web Module (I call it MyAppWeb)

Now how to include JPA? Eclipse is giving me choice to include JPA in MyAppEJB and/or MyAppWeb.

Q1: Should JPA be part of MyAppEJB only?

Q2: Should JPA be part of MyAppWeb only?

Q3: Should JPA be part of both MyAppEJB and MyAppWeb?