the following problems related to Control chart (Chapter 3) ABC Inc. presents the length in centimeters of one part from the following table. Please calculate the Upper Control Limit (UCL) and Lower Control Limit (LCL) for both x-bar and R-chart. Do you think the process is under control, why? Table 1. Sample # Observation 1 Observation 2 Observation 3 Observation 4 1 0.486 0.499 0.493 0.511 2 0.499 0.506 0.516 0.494 3 0.496 0.5 0.515 0.488 4 0.495 0.506 0.483 0.487 5 0.472 0.502 0.526 0.469 6 0.473 0.495 0.507 0.493 7 0.495 0.512 0.49 0.471 8 0.525 0.501 0.498 0.474 9 0.497 0.501 0.517 0.506 10 0.495 0.505 0.516 0.511