1. Calculate the control limits for the mean chart, and conclude if this process is in control or not according to the mean chart. If the process is not in control, please identify which sample(s) is (are) out of control.
2. Calculate the control limits for range chart, and conclude if this process is in control or not according to the range chart. If the process is not in control, please identify which sample(s) is (are) out of control.

Bruno's Plant makes a critical part for a popular brand of laptops. Consider the data for 15 samples of size 4 of a key dimension for the part, shown in the following worksheet. Specifications are 0.110 + 0.02. + Sample 1 0.11 0.118 0.1 0.108 2 0.12 0.117 0.103 0.114 3 0.107 0.102 0.11 0.109 4 0.115 0.114 0.109 0.118 5 0.119 0.108 0.119 0.116 6 0.119 0.105 0.112 0.114 7 0.112 0.111 0.118 0.112 8 0.099 0.116 0.111 0.115 9 0.107 0.115 0.109 0.11 10 0.107 0.117 0.108 0.104 11 0.106 0.113 0.107 0.098 12 0.106 0.111 0.113 0.11 13 0.119 0.112 0.114 0.106 14 0.122 0.114 0.109 0.114 15 0.119 0.115 0.11 0.115