PA $14-7($Static$)$ EShack sells an ergonomic keyboard... points

Use Appendix $14$A$.$ EShack sells an ergonomic keyboard in one of its stores. Average weekly demand for this keyboard follows a Poisson distribution with mean $0\mathrm{.}8$ unit. It submits orders to the supplier weekly and the supplier delivers with a two$-$week lead time.

a$.$ Suppose it uses an order$-$up$-$to level of five. What is its average order quantity? answer $=0\mathrm{.}8$

Note: Round your answer to $1$ decimal place.

Answer is complete and correct.

Average order quantity

b$.$ Suppose it uses an order$-$up$-$to level of nine. What is its expected on$-$hand inventory? answer $=6\mathrm{.}6$

Note: Round your answer to $1$ decimal place.

Answer is complete and correct.

Expected on$-$hand inventory

c$.$ Suppose it uses an order$-$up$-$to level of six. What is its expected on$-$order inventory? Note: Round your answer to $1$ decimal place. answer $=1\mathrm{.}6$

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~ Answer is complete and correct.

$\backslash$xpected on$-$order inventory

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d$.$ Suppose it uses an order$-$up$-$to level of seven. What is its in$-$stock probability? Note: Round your answer to $4$ decimal places.

Answer is not complete.

In$-$stock probability

e$.$ Suppose it uses an order$-$up$-$to level of four. What is its stockout probability?

Note: Round your answer to $4$ decimal places.

Answer is not complete.

I need d and e completed

f$.$ Suppose it wants a $0\mathrm{.}97$ in$-$stock probability. What should its order$-$up$-$to level be$?$ answer $=6$