A puppet production factory is monitoring its process and the following data is collected over 5 weeks with one batch randomly sampled from each week. In each batch, 10 puppets are produced. (time unit: seconds).

	Week 1	Week 2	Week 3	Week 4	Week 5
Average Processing time	59.6	64	60.2	61.1	53.6
Range of processing time	8.5	13	12	11.1	7.4
Defective units	0	0	1	2	5

A: Calculate the center limit for the P-chart (4pts)

B: Calculate the LCL (3pts) for the X-chart [hint: sigma unknown]

C: Calculate the UCL (3pts) for the X-chart [hint: sigma unknown]

D: What is the UCL for the R-chart?

E: Calculate the LCL (3pts) for the R-chart of the production process.

F: Based on the control charts results, which one of the following chart best depicts this production process?