A critical parameter is monitored on a process, and measurements yield data from mean and range computations. During every sample period, 5 observations are recorded. The overall mean for the process is 25 and the average range is 6.4. Given the table of contro chart factors, compute the upper control limit for the 3-sigma X-bar chart. Round your answer to one decimal place, if applicable. \begin{tabular}{|c|c|c|c|c|} \hline Subgroup & A2 & D3 & D4 & d2 \\ \hline Size (n) & & & & \\ \hline 2 & 1.880 & & 3.267 & 1.128 \\ \hline 3 & 1.023 & & 2.574 & 1.693 \\ \hline 4 & 0.729 & & 2.282 & 2.059 \\ \hline 5 & 0.577 & & 2.114 & 2.326 \\ \hline 6 & 0.483 & & 2.004 & 2.534 \\ \hline 7 & 0.419 & 0.076 & 1.924 & 2.704 \\ \hline 8 & 0.373 & 0.136 & 1.864 & 2.847 \\ \hline 9 & 0.337 & 0.184 & 1.816 & 2.970 \\ \hline & & & & \\ \hline & & & & \\ \hline \end{tabular}