... the most difficult individual PT sections in all three ... -S4, 9-S2, 10-S4, 11-S4, 12-S4, 14-S2, 14-S4, ... 18-S2, 21-S3, F97-S3, 22-S4 ... , 62-S2, 69-S4, 70-S4, 71-S3, 72- ... 9, 13, 15, 18, 19, 21, F97, 26, 27, ... myself with doing the PT A, B, and ...