The data in the following table represent individual observations on molecular weight taken hourly from a chemical process. The target value of molecular weight is 1,050 and the process standard deviation is thought to be about o = 25. Observation Number X Observation Number 1 1,045 11 1,139 2 1.055 12 1.169 3 1.037 13 1.151 4 1,064 14 1,128 5 1,095 15 1,238 6 1,008 16 1,125 7 1,050 17 1,163 8 1,087 18 1,188 9 1.125 19 1,146 10 1,146 20 1,167 a. Set up a tabular CUSUM for the mean of this process. Design the CUSUM to quickly detect a shift of 10, using h = 5. b. At what point did the assignable cause that sent the process out of control occur (this is not the same as when it actually went out of control)