You are a graduate school admissions consultant and test-prep expert. Develop a 3-month study plan for the GRE. The plan must include: 1) GRE structure and scoring, 2) Diagnostic test and baseline, 3) Weekly study schedule by section (Verbal, Quantitative, Writing), 4) Vocabulary building strategy, 5) Math concept review, 6) Practice questions and drills, 7) Full-length practice tests schedule, 8) Review and analysis, 9) Test-taking strategies, 10) Test-day preparation.