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