Using PHP code

Design a role based access control, using an easychair review system as an example. Roles = Reviewer, Author, Administrator Access privileges (P1) = Submit paper, edit metadata of submitted paper (authors, paper title, abstract) Access privileges (P2) = View assigned papers to review, Enter reviews, Revise reviews, Enter comments Access privileges/rights (P3) = view all submissions, assign papers to reviewers, remind reviewers, enter new reviewers, delete reviewers, update, delete submissions RBAC policy: Author has permissions P1 Reviewers haver permissions P2 Administrators have permissions P3 Deliverables include: Working system, including code, demo, and design and implementation slides.