prepare p-chart and c-chart; explain whether the process is in statistical control in each case. Use z = 3 (99.7%) in both cases.

ABC Company		n =100
Sample	Fraction Defective
1	0.11
2	0.16
3	0.12
4	0.10
5	0.09
6	0.12
7	0.12
8	0.15
9	0.09
10	0.13
11	0.16
12	0.20
13	0.15
14	0.12
15	0.11
16	0.11
17	0.14
18	0.16
19	0.10
20	0.13

XYZ Company
Sample	Number Defective
1	11.00
2	16.00
3	12.00
4	10.00
5	9.00
6	28.00
7	13.00
8	15.00
9	9.00
10	13.00
11	16.00
12	20.00
13	15.00
14	12.00
15	11.00
16	30.00
17	14.00
18	16.00
19	10.00
20	13.00