Help please

A quality inspector took six samples, each with twenty observations, of the weight of a bagging process, in pounds. The sample means and ranges are shown below. Sample 1 2. 3 Mean 3.55 3.80 3.50 3.60 3.50 3.55 Range 0.55 0.75 0.55 0.51 0.53 0.65 4 5 6 Use this information to obtain a three-sigma control chart (z = 3) for the mean weight. Process standard deviation is 0.27. Use that control chart to answer the questions below. Do not round intermediate calculations. Round your final answers to three decimal points. Question 3 (2.5 points) Listen What is the upper control limit? Your Answer: Question 3 (2.5 points) Listen What is the upper control limit? Your