CREATE TABLE table_67574 ("Status" TEXT, "Name" TEXT, "First Performance" TEXT, "Last Performance" TEXT, "Style" TEXT)

when was the first performance for the ballet with peter mazurowski in the final cast?
SELECT "First Performance" FROM table_67574 WHERE "Style" = 'ballet' AND "Status" = 'final cast' AND "Name" = 'peter mazurowski'
SELECT "First Performance" FROM "table_67574" WHERE "Name" = 'peter mazurowski' AND "Status" = 'final cast' AND "Style" = 'ballet'