The quality$-$control plan for a certain production process involves taking samples of size $4.$ The results from the last $30\mathrm{.}00$ samples can be summarized as follows:

$30\mathrm{.}00$i$=1$X$$i$=712\mathrm{.}5$

$30\mathrm{.}00$i$=1$Ri$=143\mathrm{.}7$

$30\mathrm{.}00$i$=1$si$=62\mathrm{.}5$

Compute the $3\backslash$sigma control limits for the R chart. $($Round the final answer to three decimal places.$)$

The LCL is $0$ Numeric ResponseEdit Unavailable.

The UCL is $1\mathrm{.}384$ Numeric ResponseEdit Unavailable.