Shown below is a control chart determined from attribute data. Given this chart and the plotted observations, the most appropriate action would be: .06 Upper Control Limit 05 .04 Proportion Defective .03 .02 X- .01 .00 Lower Control Limit 1 2 3 4 5 6 7 8 9 Sample Number M Mean a. Select one: take immediate action to identify the signaled causes of assignable variation. b. do nothing since the process appears in control. calculate the process capability index to verify it is less then one. d. take immediate action to identify the signaled causes of random (statistical) variation. calculate the process capability index to verify it is greater than five. C. e