Please answer a

Problem 2 (10 points): Alcoa is making long aluminum rods for the frame of airplanes for the Boeing Company. The current process produces these rods, which need to pass a tensile strength test. Alcoa collected 6 observations every two hours in the first shift. The X-bar's and range are given below: Sample OBS. 1 OBS. 2 OBS. 3 OBS. 4 OBS. 5 OBS. 6 Mean Range Number 1 37.00 37.50 38.50 40.00 39.00 42.00 39.00 5.00 2 38.00 37.00 41.50 39.00 38.50 37.00 38.50 4.50 3 38.50 42.50 41.50 42.00 42.50 42.00 41.50 4.00 4 37.00 42.50 41.00 42.50 42.00 41.00 41.00 4.50 a. Determine the control limits for the X-chart and the R-chart. [7 pts.]