Question $7(25$ points$)$

What is the LCL for the R chart?

Question $7$ options:

$1\mathrm{.}82$

$0\mathrm{.}82$

$1\mathrm{.}17$

$0\mathrm{.}51$

$1\mathrm{.}59$

$0\mathrm{.}29$

$0$