Are the following three processes $4-$sigma capable? Are they $3-$sigma capable?

$---$Note processes $1$ and $2$ are centered $($i$.$e$.,\backslash$mu $=$ T $)$ where T $=($US $+$ LS$)/2$ ; process $3$ is not.$--$

$---$A process is $3-$sigma capable if Cp or Cpk $1$; it is $4-$sigma capable if Cp or Cpk $1\mathrm{.}333.$