2) A manufacturer of Printed Circuit boards (PCB) periodically examines them for quality (75pts) a) Subgroups of 110 PCB each are selected and examined for defects. The following data shows the number of PCB with at least one defect when examining 27 total subgroups 1)9 2) 6 3 )6 4) 6 5 )3 6 )57)4 8)7 9) 5 10 )7 11) 11 12) 13 13 )7 14) 12 15) 12 16) 3 17) 15 18) 8 19) 4 20 )13 21)8 22) 5 23)10 24)13 25)7 26) 9 27) 2 Draw the appropriate control chart and comment on stability or lack of. (50pts) b) If it is known that at most 6 percent of the PCB produced are defective, what should be the Appropriate subgroup size? (25pts)