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3. Small boxes of Caesar salad croutons are labeled "net weight 3.5 ounces." To construct control charts, random samples of 4 boxes were weighed. Five hours of observation yielded: a. Calculate the upper and lower control limits for the x chart? Draw the control chart. b. Calculate the upper and lower limits for the Range chart? Draw the control chart. c. Is this process in control? Explain-a simple yes or no answer is insufficient. d. What type of variation is present in each control chart