求助EOQ的问题

请教各位，帮忙解答，这几个是同类型的题，不知道如何解答，还请大家帮忙，谢谢了！

关于EOQ的问题

1、A company determines its order quantity for a component using the EOQ model.

What would be the effects on the EOQ and the total annual ordering cost of an in crease in the annual cost of holding one unit of the component in stock?

              EOQ                       Total annual ordering cost

A           Lower                         Higher

B           Higher                         Lower

C           Lower                          No effect

D           Higher                         No effect

2、A  company determines its order quantity for a raw material by using the EOQ model.

What would be the effects on the EOQ and the total annual holding cost of a decrease in the cost of ordering a batch of raw material?

                EOQ                          Total annual ordering cost

   A          Higher                            Lower

  B           Higher                            Higher

  C           Lower                             Higher

  D           Lower                             Lower

3、A company determines its order quantity for a raw material using the EOQ model.

What would be the effects on the EOQ and in the total annual stockholding cost of a decrease in the cost of placing an order for the raw material?

                EOQ                         Total annual stockholding cost

A            Increase                            No effect

B            Decrease                            No  effect

C            Increase                            Increase

D            Decrease                           Decrease