The specifications for a manifold gasket that installs between two engine parts calls for a thickness of $2\mathrm{.}500$ mm $\backslash$pm $\mathrm{.}020$ mm$..$ The process is currently operating at a mean thickness of $2\mathrm{.}50$ mm$.$ The standard deviation of the process is estimated to be $0\mathrm{.}004$ mm $1)$ Is the process capable? Why? $2)$ Is the process six$-$sigma capable? Why?