A mail-order prescription drug vendor measured the number of errors per standard order being picked in their distribution center. Data can be found in the table below.

Sample	Number of Errors	Sample	Number of Errors
1	1	21	0
2	0	22	0
3	2	23	2
4	1	24	1
5	2	25	0
6	1	26	1
7	0	27	0
8	0	28	1
9	1	29	2
10	2	30	0
11	0	31	2
12	1	32	1
13	2	33	1
14	0	34	0
15	1	35	0
16	0	36	0
17	1	37	1
18	1	38	0
19	1	39	2
20	0	40	1

What is the average number of errors per order? Do not round intermediate calculations. Round your answer to three decimal places.

Compute the control limits for a c-chart. Do not round intermediate calculations. If your answer is zero, enter "0". Round your answers to three decimal places.

UCL_c:

LCL_c:

Choose the correct graph for the c-chart.