and $=5.$

$($a$)$ What is the recommended order quantity? $($Round your answer to the nearest integer.$)$ to answer this question. Round your answers to the nearest integer.$)$

reorder point

safety stock

$($c$)$ If a manager sets the reorder point at $30,$ what is the probability of a stock$-$out on any given order cycle? $($Round your answer to four decimal places.$)$

How many times would you expect a stock$-$out during the year if this reorder point were used? $($Round your answer to the nearest integer.$)$