Consider a continuous review inventory system. Demand is normally

distributed with an average of $28,000$ per month and a monthly standard

deviation of $4900$ units. Lead time is $3$ weeks $($assume four weeks per month$)$

$($round Z$-$values, standard deviations to two decimal places$).$

If the firm desires a$($n$)90\%$ cycle service level, it should hold units of

safety stock $($round your response to the nearest integer$).$