Refer to the table factors for Computing Control Chart Limits (3 siama for this problem. The overall average of a process you are attempting to monitor at Feryal Erhun Enterprises is 42 units. The average range is 7 units. The sample size you are using is n=4. a) What are the upper and lower control limits of the 3-sigma mean chart? Upper control limit (UCLX)= units (round your response to three decimal places). Data table Sample Size, n Lower Range, D2 2 3 4 5 Mean Factor, A2 1.880 1.023 0.729 0.577 0.483 Upper Range, D4 3.268 2.574 2.282 2.115 2.004 0 0 0 0 0 O or 04 1 000 6 7 8 9 10 12 0.483 0.419 0.373 0.337 0.308 0.266 2.004 1.924 1.864 1.816 1.777 1.716 0 0.076 0.136 0.184 0.223 0.284 a) What are the upper and lower control limits of the 3-sigma mean chart? Upper controllimit (UCL) -units (round your response to three decimal place Lower controllimit (LC,)-units (round your response to three decimal place b) What are the upper and lower control limits of the 3-sigma range chart? Upper controllimit (UCLR) -unite (round your response to two decimal places Lower controllimit (LCLR) -units (round your response to two decimal placed