The data in the following table represent individual observations on molecular weight taken hourly from a chemical process. Observation no. 11 Observation no. 1 2 3 4 5 6 7 8 9 10 X 1045 1055 1037 1064 1095 1008 1050 1087 1125 1146 12 13 14 15 16 17 18 19 20 X 1139 1169 1151 1128 1238 1125 1163 1188 1146 1167 The target value of molecular weight is 1050 and the process standard deviation is thought to be about 6 = 25. a) Set up a tabular CUSUM for the mean of this process. Design the CUSUM chart using the standardized values h = 4.77 and k = 0.5. Interpret this chart. 1 b) Is the estimate of o used in part (a) of this problem reasonable? c) Set up an EWMA control chart using a = 0.2 and L = 3 for this process. Interpret the results