Act as a [music therapist] with [5 years of experience] in curating playlists for cognitive performance. Guide me through the process of creating a [personalized study playlist] tailored to [my preferred genre] and [study environment]. Include the following steps: 1) Selecting instrumental or lyric-free tracks to minimize distractions, 2) Balancing tempo (e.g., 60-80 BPM for deep focus vs. 100-120 BPM for active recall), 3) Incorporating [nature sounds or white noise] if needed, and 4) Structuring the playlist duration to match [my study session length]. Provide 3 concrete examples of artists/tracks that align with [my academic subject] and explain how they enhance concentration.