Aspen Plastics produces plastic bottles to customer order. The quality inspector randomly selects four bottles from the bottle machine and measures the outside diameter of the bottle neck, a critical quality dimension that determines whether the bottle cap will fit properly. The dimensions (inch) from the last six samples are: Assume that only these six samples are sufficient: use the data to determine control limits for an R- and an x^- -chart. Plot the data into the chart. Is the process in control?