Construct an X chart–R chart for the following data set. (Leave no cells blank - be certain to enter "0" wherever required. Do not round intermediate calculations. Round your answers to 2 decimal places.)

Sub group No	6:00	10:00	14:00	18:00	22:00	x bar	R
1	13.4	12.5	13.7	13.9	13.5	13.4	1.4
2	15.0	13.4	12.4	13.8	12.0	13.3	3.0
3	14.6	12.4	12.9	12.0	12.6	12.9	2.6
4	14.7	12.4	12.1	12.5	13.0	12.9	2.6
5	14.7	12.4	12.1	12.4	12.3	13.0	2.4
6	13.4	12.5	12.1	13.5	12.3	12.8	1.4
7	13.4	12.3	12.8	12.0	13.0	12.7	1.4
8	13.3	12.1	13.7	13.0	12.5	12.9	1.6
9	13.2	12.8	12.5	13.7	12.6	13.0	1.2
10	14.4	12.5	13.9	13.6	14.0	13.7	1.9
11	14.2	13.1	12.9	13.3	13.3	13.4	1.3
12	13.6	13.2	13.4	14.0	13.7	13.6	.8
13	14.8	12.2	13.1	12.0	12.1	12.8	2.8
14	13.5	12.5	12.4	14.0	13.1	13.1	1.6
15	14.5	12.4	12.7	14.0	13.9	13.5	2.1
16	13.5	13.4	12.3	13.0	12.4	12.9	1.2
17	14.0	12.7	13.6	13.8	13.0	13.4	1.3
18	14.3	13.4	13.4	12.5	12.6	13.2	1.8
19	14.2	12.4	12.6	12.0	13.3	12.9	2.2
20	14.5	13.2	13.2	12.9	12.6	13.3	1.9
21	13.5	13.3	13.6	12.3	12.1	13.0	1.5
22	13.3	13.3	12.9	13.1	13.5	13.2	.6
23	13.9	13.4	13.3	12.2	13.4	13.2	1.7
24	13.0	13.3	13.0	12.8	13.0	13.0	.5
25	14.9	12.2	13.2	12.1	12.1	12.9	2.8
					Sum	328.08	43.60
				Grand Mean		13.12	1.74

Data Points	X Chart	R Chart
Central line
Lower control limit (LCL)
Upper control limit (UCL)