Wells Fargo wants to investigate its loan application processing time. Table below shows the samples that have been taken from 4 branches for 25 random days. Examine the process output by calculating the control limits and developing X-bar and R control charts using the data given. Does the process look to be in statistical control?

Day	Branch 1	Branch 2	Branch 3	Branch 4
1	8	12	37	6
2	20	23	33	20
3	24	19	21	10
4	21	16	29	8
5	12	16	24	14
6	25	12	27	11
7	14	21	23	10
8	10	27	39	23
9	23	15	31	20
10	23	8	23	8
11	17	10	26	21
12	24	24	26	24
13	13	14	19	19
14	9	21	24	13
15	12	9	28	22
16	26	11	14	24
17	20	13	18	23
18	5	20	30	7
19	8	13	22	7
20	28	23	35	12
21	25	14	14	20
22	12	11	31	17
23	21	13	17	23
24	14	15	21	16
25	16	13	24	21

Please show how the answers could be calculated in Excel.