Six samples of five observations each have been taken of 80kg concrete slabs produced by a machine, and the results are displayed below. a-1. Using factors from Table 10-3, determine the upper and lower control limits for sample mean and range. (Do not leave any empty spaces; input a 0 wherever it is required. Round your intermediate calculations and final answers to 2 decimal places.) a-2. Decide if the process is in control. Process is not in control. Process is in control. b. A new sample results in the following slab weights: 80.2,80.3,81.8,79.6, and 81.3. Use the control limits determined in part a to decide if the process is still in control. Process is not in control. Process is in control