C$-$Spec, Incorporated, is attempting to determine whether an existing machine is capable of milling an engine part that has a key specification of $4\backslash$pm $0\mathrm{.}03$ inches. After a trial run on this machine, C$-$Spec has determined that the machine has a sample mean of $4\mathrm{.}010$ inches with a standard deviation of $0\mathrm{.}003$ inch.

Calculate the Cpk for this machine.