operations management, please help and show all work

4 2. A tire manufacturer has been concerned about the number of defective tires found recently. In order to evaluate the true magnitude of the problem, a production manager selected 10 random samples of 20 units each for inspection. The number of defective tires found in each sample are as follows: Sample Number Defective 1 1 2 3 3 2 1 5 4 1 7 2 0 9 3 10 1 a) Develop a p-chart with a z = 3. b) Suppose that the next four samples selected had 6,3,3, and 4 defects. What conclusion can you make? 6 8