An x-ray lab uses statistical process control to control the quality of service provided. For Processing errors, the number of incorrectly processed xrays each day is recorded. For Waiting time for the xray technician, the waiting times of all patients each day are recorded. What types of control charts should be used?
A. c-chart for (1), mean and range charts for (2)
B. mean and range charts for (1), c-chart for (2)
C. p-chart for (1), mean and range charts for (2)
D. mean and range charts for (1), p-chart for (2)
E. p - chart for (1), c-chart for (2)