1. The Watson Electric Company produces incandescent light bulbs. The following data on the number of lumens for 40-watt light bulbs were collected when the process was in control. w 1 2 3 4 SAMPLE 1 504 512 488 500 2 497 501 507 503 3 481 470 485 492 4 520 505 495 488 5 490 514 508 504 Calculate an X-chart and R-chart based on the above data. Plot the X and R charts and state if the process is in control