The upper and lower specification limits for a certain product are $7\mathrm{.}3$ lbs$.$ and $7\mathrm{.}0$ lbs$.$ Actual data indicates that the product is currently running at an average of $7\mathrm{.}465$ lbs$.,$ with a standard deviation of $0\mathrm{.}03039$ lbs$.$ The calculations indicate Cp$=1\mathrm{.}645$ and Cpk$=-1\mathrm{.}81.$ What conclusions can be made about the process?

Question $4$ options:

There is something wrong with the calculations; a negative Cpk is not possible.

The specification limits must be set unrealistically.

The process is close to $6$ sigma; the negative Cpk is irrelevant.

The Cp and Cpk values indicate that the process is capable but not centered.