A purchasing agent has requested quotes for valve gaskets with diameters of $3\mathrm{.}0\backslash$pm $0\mathrm{.}018$ inches. SPC studies of three suppliers have indicated that their processes are in statistical control and produce measurements that are normally distributed with the following statistics:

Supplier $1$: $\backslash$mu $=3$ inches $\backslash$sigma $=0\mathrm{.}009$ inch Supplier $2$: $\backslash$mu $=3$ inches $\backslash$sigma $=0\mathrm{.}0044$ inch Supplier $3$: $\backslash$mu $=2\mathrm{.}99$ inches $\backslash$sigma $=0\mathrm{.}003$ inch

Assuming that all suppliers offer the same price and delivery reliability$/$flexibility$,$ which supplier should the agent purchase from? Explain your reasoning.