As a part of quality control, ABC Electronics measured the maximum speaker volume in 100 feet distance for six weeks. Below is the data in decibels (dB). Week Decibel (dB) 1 104 101 99 100 103 2 103 100 106 103 105 3 103 106 108 105 103 4 98 103 107 104 106 5 104 101 103 102 105 6 100 97 105 112 106 1) Develop a mean control chart and evaluate whether the product quality is in control. (12) 2) Develop an R-chart and evaluate whether the product quality is in control. (12)