Assume you have run a repeatability and reproducibility study for a process and you have calculated the following statistics:

Equipment variance $=0\mathrm{.}106$

Appraisal variance $($operator variance$)=0\mathrm{.}057$

Repeatability and reproducibility variance $=0\mathrm{.}120$

Part variance $=0\mathrm{.}045$

What is total variance?

$0\mathrm{.}129$

$0\mathrm{.}208$

$0\mathrm{.}163$

Answer D is wrong