A Quality Controller conduct regular inspection on moulded components. 30 subgroups has been collected. Number inspected for each subgroup is 100 components. Defect types are classified as short molded, flow marks, silver streaking, voids, sink marks and warpage. Data on count of defects has been collected and recorded by the Quality Controller and shown in Table 1.1. Table 1.1: Number of defective units Number of Subgroup Subgroup defective units Number of defective units Subgroup Number of defective units 1 5 11 4 21 4 2 0 12 5 22 6 3 2 13 0 23 19 4 3 14 2 24 2 5 6 15 25 6 6 16 6 26 7 17 27 3 8 6 18 28 0 9 7 19 8 29 9 10 4 20 6 30 in i) Calculate the central line, upper and lower control limits and analyze the process ii) Based on the chart provided (please refer Appendix II), draw an appropriate control limits line, complete the plot and interpret the charts