Real, actual data for a Decision Science problem is given as $3\mathrm{.}12,2\mathrm{.}98,3\mathrm{.}67,2\mathrm{.}88,$ and $3\mathrm{.}01$ therefore the answer should be rounded to the form:

a$.x.xx$

b$.x.x$

c$.xx.x$

d$.x\mathrm{.}00$