Sample Sample Sample Sample Sample 3 4 5 Obs.1 16.4 15.97 15.91 16.2 15.87 Obs.2 16.11 16.1 16 16.21 16.21 Obs.3 15.9 16.2 16.04 15.93 16.34 Obs.4 15.78 15.81 15.92 15.95 16.43 1) Construct a x-bar chart) using the data above (2 points) 2) Construct a R-chart (2 points) using the data above (2 points) 3) Is the production process in quality control? Why? (1 point) 4) If the quality manager collects a new sample today with the following observation values: 15.43, 15.49, 15.55, 15.92, is the process still in control? Why ?(1 point) 5) Use the UCL and LCL that you calculated for the x-bar chart in problem 1 as USL and LSL. Given that the process mean is 16 and process standard deviation is 0.09, calculate Cp and Cok, What is your conclusion about the process's capability of meeting the predetermined specifications? (3 points)