If daily demand is

$5$

$0$

$$units

$($

normally distributed

$)$

$,$

$$the standard deviation of the daily demand is

$5$

$$units$,$ lead time is

$4$

$$days

$($

constant

$)$

$,$ What would be the average demand during lead time, rounded to the nearest whole number? The company tolerates a $2\mathrm{.}5\%$ stockout.