$($b$)$ If n $=10$ time headway observations are made, resulting in the values $3\mathrm{.}11,0\mathrm{.}37,2\mathrm{.}55,2\mathrm{.}20,5\mathrm{.}44,3\mathrm{.}42,10\mathrm{.}39,8\mathrm{.}93,17\mathrm{.}50,$ and $1\mathrm{.}30,$ calculate the estimates of $$ and $.($Round your estimate of $$to three decimal places.$)$