The open-loop CNC table drive in the figure uses a stepper motor driving a single-start ball screw through a 24T/60T gear pair. Step angle data, gear teeth, screw pitch and the required feed are given on the figure. Determine (a) the basic length unit (BLU), i.e. the table travel per pulse (answer in mm), (b) the pulse frequency the controller must send for the feed shown (answer in Hz) and (c) the motor speed (answer in rpm).