Riverview Clinic has started a customer satisfaction program. In addition to other questions, each patient is asked if she is satisfied with her overall experience at the clinic. Patients can respond "yes" if they were satisfied or "no" if they were not satisfied. Typically, 200 patients are seen at the clinic each day. The data collected for two months are shown in the following chart:

Day	Proportion of patients who were unsatisfied	Day	Proportion of patients who were unsatisfied	Day	Proportion of patients who were unsatisfied
1	0.17	15	0.15	28	0.18
2	0.13	16	0.14	29	0.19
3	0.15	17	0.13	30	0.14
4	0.22	18	0.15	31	0.19
5	0.16	19	0.15	32	0.10
6	0.13	20	0.22	33	0.17
7	0.17	21	0.19	34	0.15
8	0.17	22	0.15	35	0.17
9	0.11	23	0.12	36	0.15
10	0.16	24	0.16	37	0.15
11	0.15	25	0.18	38	0.15
12	0.17	26	0.14	39	0.14
13	0.17	27	0.17	40	0.19
14	0.12

1. Construct a p-chart using the collected data.
2. Is the process in control?
3. On average, how many patients are satisfied with Riverview Clinic's service? If Riverview wants 90 percent (on average) of patients to be satisfied, what should the clinic do next?