p-chart to monitor

The Shoe Store manufactures athletic shoes. The company wants to establish a p-chart to monitor the production process using Z = 3.00. The company has taken a sample of 50 shoes every 4 hours for a work week of five days. Since the company runs two 8-hour shifts each day, this will result in 20 samples. The sample results are as follows.

Sample   Number of
Defectives   Proportion
Defective
Sample   Number of
Defectives   Proportion
Defective
1   0   0.00   11   4   0.08
2   1   0.02   12   1   0.02
3   0   0.00   13   1   0.02
4   3   0.06   14   2   0.04
5   2   0.04   15   2   0.04
6   5   0.10   16   3   0.06
7   3   0.06   17   4   0.08
8   2   0.04   18   1   0.02
9   1   0.02   19   5   0.10
10   0   0.00   20   2   0.04

The population proportion defective is not known. Construct a p-chart to monitor this process.