Thickness measurements of a coating process are made to the nearest hundredth of a millimete The thickness measurements are uniformly distributed with values $278,278\mathrm{.}4843,278\mathrm{.}9686,$dots $296\mathrm{.}4034.$ Determine the variance of the coating thickness for this process.

Select one:

a$.28\mathrm{.}22376096$

b$.29\mathrm{.}70922207$

C$.31\mathrm{.}29099430$

d$.287\mathrm{.}20170000$

e$.28\mathrm{.}20421542$