Loan Processing times are being monitored at a local company. Samples of ten observations each have been taken, and the results are listed. Using Factors from Table $10\mathrm{.}2,$ determine lower and upper control limits for a a Range chart

Sample Number $123$

$-------------636560$

$-------------616475$

$-------------725879$

$-------------696364$

$-------------746364$

$-------------745467$

$-------------666166$

$-------------757466$

$-------------797276$

$-------------695960$