Design a structured learning path for {{target_audience}} to reach graduate-level ability in {{topic}}, enabling learners to {{goal}}. Use a {{tone}} tone. Create a 20-week path with 4 phases: Foundation (weeks 1-4), Skill Development (5-10), Advanced Application (11-16), Mastery (17-20). Include weekly schedule and progress tracking. Present as 7 numbered steps with action title, instructions, expected outcome, and common pitfalls. Max 1600 words, Markdown, specific to topic and audience.