Electric Drill according to the shop manual, when drilling a 12.7-mm-diameter hole in wood, plastic, or aluminum,

Question:

Electric Drill according to the shop manual, when drilling a 12.7-mm-diameter hole in wood, plastic, or aluminum, a drill should have a speed of 1250 rev/min. For a 12.7-mm-diameter drill bit turning at a constant 1250 rev/min, find
(a) The maximum linear speed of any part of the hit and
(b) The maximum radial acceleration of any part of the bit.