A CNC router moves a cutting tool along the X and Y axes using two identical motor driven ball screw assemblies (each with a pitch of 12 mm). A calibration test was performed on the Y-axis with 50 full rotations of the motor and the following displacement measurements were recorded: 604.35 mm, 603.65 mm, 603.50mm, 604.00 mm and 604.50 mm i. Determine the programmed displacement of the Y-axis (in mm). ii. iii. Calculate the accuracy error (in mm). The CNC router vendor lists the repeatability of each stage as +/- 0.50 mm. Is the system still repeatable? Show all your work clearly.