Selected financial statement data for $2$ years ended December $31$ for Carey Co$.$ follow. Assets are reported at their year$-$end values.

What is the days' cash on hand for each year?

a$.$ Year $2$: $210\mathrm{.}1$ ; Year $1$: $208\mathrm{.}9$

b$.$ Year $2$: $215\mathrm{.}6$ ; Year $1$: $222\mathrm{.}9$

c$.$ Year $2$: $258\mathrm{.}1$; Year $1$: $265\mathrm{.}1$

d$.$ Year $2$: $251\mathrm{.}5$ ; Year $1$: $248\mathrm{.}5$