A robot arm is to be tested for its accuracy and repeatability. The arm is programmed to achieve the same position along the x-axis and the following displacements were measured by an external sensor: Reading No. x-axis measurement (mm) 100.100 100.095 100.105 100.090 100.097 100.102 1 2 3 4 5 6 Determine the arm's accuracy error and repeatability along the x-axis if the target position was 100 mm.