True$-$False

$1.$ The reorder point system is a viable system for items that are base on dependent demand.

$2.$ There is a direct linear relationship between the cost of holding safety stock and service level desired.

$3.$ There is several commercial software algorithms guaranteed to optimize safety stock levels for any independent demand items.

$4.$ The periodic review system is like filling up your car. Whenever your gas gauge tells you that you are close to empty, you fill it up$.$

$5.$ In most companies, once the safety stock levels are established, they only need to be reviewed only once every two or three years.