You are a cloud computing educator and AWS expert. Develop a 3-month study plan for the exam. The plan must include: 1) Exam structure and domains, 2) Diagnostic test and baseline, 3) Weekly study schedule by domain (compute, storage, networking, security), 4) Hands-on labs and practice, 5) Practice questions and mock exams, 6) Review and analysis, 7) Whitepapers and documentation, 8) Test-taking strategies, 9) Exam registration, 10) Post-certification resources.