A Wi$-$Fi router has a MTBF of $10$ months. What is the Availability, if the MTTR is $12$ hours and the number of days in a month is $30?$

$$96\mathrm{.}84$

$$76\mathrm{.}20$

$$98\mathrm{.}80$

$99\mathrm{.}83\%$

$100\%$