Which of the following selections are used to determine an order quantity $($i$.$e$.,$ size of order$)?$

Group of answer choices

Economic Order Quantity $($EOQ$)$ Model and Reorder Point $($ROP$)$ Model.

Economic Order Quantity $($EOQ$)$ Model and Economic Run Length $($ERL$)$ Model.

$.$ Economic Run Length $($ERL$)$ Model and Reorder point $($ROP$)$ Model.

Economic Order Quantity $($EOQ$)$ Model only

Reorder Point $($ROP$)$ Model only.