Problem $1.$ Daily random demand D for newspapers at a newspaper stand has a Poisson distribution with parameter $\backslash$lambda $>0.$ That is$,$

P$($D $=$ d$)=$ e

$\backslash$lambda $\backslash$lambda

d

d$!$

$,$ for d $=0,1,2,....$

A Newsvendor has observed that the daily demands for newspapers over the past $8$ days were

$10,0,14,8,9,13,17,9.$