Based on available information, lead time demand for PC thumb drives averages $53$ units $($normally distributed$),$ with a standard deviation of

$4$ drives. Management wants an $85\%$ service level. Refer to the standard normal table for $z-$values.

a$)$ What value of $Z$ should be applied?

b$)$ How many drives should be carried as safety stock? units $($round your response to the nearest whole number$).$

c$)$ What is the appropriate reorder point? units $($round your response to the nearest whole number$).$

Z$-$Table

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