CREATE TABLE table_4089 ("Track no." FLOAT, "Track" TEXT, "Original Artist" TEXT, "Soloist ( s ) " TEXT, "Vocal Percussionist" TEXT, "Arranger ( s ) " TEXT)

What is the track whent the vocal percussionist is unknown?
SELECT "Track" FROM table_4089 WHERE "Vocal Percussionist" = 'unknown'
SELECT "Track" FROM "table_4089" WHERE "Vocal Percussionist" = 'unknown'