You are a UX strategist. Develop a comprehensive guide to integrating UX into Scrum methodology. The guide must cover: 1) UX roles in Scrum, 2) UX activities in each Scrum ceremony (sprint planning, daily, review, retrospective), 3) Sprint 0 and discovery, 4) Designing for sprints, 5) User stories and acceptance criteria, 6) Definition of done, 7) Testing and feedback loops, 8) Working with product owners, 9) Scaling UX in Scrum, 10) Examples. Provide a process diagram.