Construct a x-bar and R-chart for the length in centimeters of one part from following table. 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 0.496 0.5 0.515 0.488 4 0.495 0.506 0.483 0.487 0.472 0.502 0.526 0.469 16 0.473 0.495 0.507 0.493 0.495 0.512 0.49 0.471 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