Based on table 1, prepare control charts and show all the required calculations of x-bar and range Show also how you get your UCL, CL and LCL for both charts a) X-bar chart (10 marks) b) R chart (10 marks) X-bar R Table 1: Lenght measurement samples ali abu ah meng ravi 1 78 77 87 78 2 77 90 76 76 3 87 82 76 75 4 84 70 77 81 5 79 86 77 78 6 83 83 71 85 7 78 76 75 82 8 71 73 83 76 constant table X bar chart Sigma estimate R chart Subgroup d2 D D Az 2.659 2 1.128 3.267 3 Az 1.880 1.023 0.729 0.577 0.483 2.574 2.282 4 5 1.954 1.628 1.427 1.287 1.182 1.099 2.114 2.004 6 7 0.419 0.373 1.693 2.059 2.326 2.534 2.704 2.847 2.970 3.078 3.173 3.258 3.336 0.076 0.136 1.924 1.864 8 9 0.337 1.032 1.816 10 0.308 0.285 0.266 0.975 0.927 0.184 0.223 0.256 1.777 1.744 11 12 0.886 0.283 LIL 1.717 1.693 13 0.249 0.850 0.307 0.328 14 0.235 0.817 3.407 1.672