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 standard deviation of the process is estimated to be $0\mathrm{.}004$ mm$.$ The process is currently operating at a mean thickness of $2\mathrm{.}50$ mm$.($a$)$ What are the upper and lower specification limits for this product? $($b$)$ What is the Cp for this process? $($c$)$ About what percent of all units of this gasket will meet specifications? Does this meet the technical definition of Six Sigma?