A quality characteristic is normally distributed, and the process has been in control for quite some time. If the specs are $45\frac{+}{-}4$ and Xbar $=43$ and sigma$-$hat $=0\mathrm{.}5,$ what is Cpk$?$

$1\mathrm{.}33$

$2\mathrm{.}0$

$0\mathrm{.}67$

$-0\mathrm{.}67$

Question $77(2$ points$)$

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A process is stable with $x-$double bar $=50\mathrm{.}0,r-$bar $=4\mathrm{.}0$ and $n=6.$ What sth