A production process for the JMF Semicon is monitored using x-bar and R charts. 10 samples of n=15 observations have been gathered with the following results:

Sample	Mean	Range
1	251	29
2	258	45
3	233	36
4	275	25
5	234	35
6	289	20
7	256	3
8	265	19
9	246	14
10	323	46

Calculate the center line (CL), upper control limit (UCL), and lower control limit (LCL) for x-bar and R charts, and then draw the conclusion about whether the process is in control or not. The charts are not required. For the calculations, please show the steps instead of only giving the final results.