please help with calculating this problem!! WILL LIKE!! instructions are included in the answer sheet! thank you so much!!!

"construct 3 sigma mean & range charts" is whats written

Assume that ten samples of eight observations each were taken of the time (in seconds) required to perform an automated drilling operation. The sample observations, along with mean times and ranges are presented in Exhibit 3-10 The data is presented horizontally instead of Vertically. Xbar (mean/avg) and R (dispersion) are done for you for each sample period. You need to calculate X double bar and R bar, determine Upper and Lower control limits, and determine if the operation is in control looking at average ( Xbar ) and dispersion (R). X double bar R bar UCL bar Show calculation: LCL x bar Show calculation: UCL R Show calculation: LCL R Show calculation: Using X bar, Is the process in control If not, what is the problem Using R, Is the process in control If not, what is the