$4.$ Software upgrade times $($in minutes$)$ are being evaluated. Samples of five observations each have$$been taken, and the results are as listed. Using factors from Table $10\mathrm{.}3,$ determine upper and lower$$control limits for mean and range charts, and decide if the process is in control.$$SAMPLE$12345679\mathrm{.}280\mathrm{.}579\mathrm{.}678\mathrm{.}980\mathrm{.}579\mathrm{.}778\mathrm{.}878\mathrm{.}779\mathrm{.}679\mathrm{.}479\mathrm{.}680\mathrm{.}680\mathrm{.}081\mathrm{.}080\mathrm{.}479\mathrm{.}780\mathrm{.}480\mathrm{.}578\mathrm{.}480\mathrm{.}480\mathrm{.}379\mathrm{.}480\mathrm{.}880\mathrm{.}081\mathrm{.}080\mathrm{.}180\mathrm{.}880\mathrm{.}678\mathrm{.}881\mathrm{.}1$