Use Appendix $14$A$.$ EShack sells an ergonomic keyboard in one of its stores. Average weekly demand for this keyboard follows a oisson 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?

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

Average order quantity

b$.$ Suppose it uses an order$-$up$-$to level of nine. What is its expected on$-$hand inventory? Note: Round your answer to $1$ decimal place.

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.

Expected on$-$order inventory

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.

In$-$stock probability