[seL4] Question about process and thread in tutorials

* I have question about process and thread in tutorials. 1. sel4 doesn't have process concept.But making new process is exist in tutorial hello-4.What is the exactly difference trhead in hello-2 and process in hello-4?2. In tutorials hello-4, where can I find access path that hello-4 process link hello-4-app?It means I think hello-4 process should designate hello-4-app's path.*