For a process $x-$double bar $=7,R-$bar $=0\mathrm{.}4,n=3,LSL=6,$USL$=9.$ Use the control chart information given to calculate an estimate of the process standard deviation. Then using this along with the specification information given calculate the value of $Cp$ and $Cpk.$ The values of $Cp$ and $Cpk$ are:

$2\mathrm{.}77,1\mathrm{.}68$

$1\mathrm{.}88,1\mathrm{.}05$

$2\mathrm{.}05,1\mathrm{.}31$

$2\mathrm{.}12,1\mathrm{.}41$