Consider the following table: Heat Hardness (coded) Heat Hardness (coded) 1 52 9 58 2 51 10 51 3 54 11 54 4 55 12 59 5 50 13 53 6 52 14 54 7 50 15 55 8 51 Fifteen successive heats of a steel alloy are tested for hardness. Set up the center line and control limits for a moving range control chart and an individual hardness measurements control chart. Is it reasonable to assume that hardness is normally distributed? Why or why not?