A blind hole 60 mm deep (to full diameter) is drilled in a steel part with a 12.7 mm twist drill of point angle 118°. The cutting speed is 15 m/min and the feed 0.20 mm/rev. Taking the approach A = 0.5D tan(90° − θ/2), determine (a) the cutting time in min and (b) the metal removal rate in mm³/min after the drill reaches full diameter.