A drilling operation is to be performed with a 12.7-mm-diameter twist drill in a steel workpart. The hole is a blind hole at a depth of 60 mm and the point angle is 118°. The cutting speed is 25 m/min, and the feed is 0.30 mmlrev. Determine
(a) the cutting time to complete the drilling operation, and
(b) metal removal rate during the operation after the drill bit reaches full diameter.