Consider the EOQ with backlogged demand model. If the optimal policy is used, determine the following in terms of K,c,λ,h,l, and Q∗ only:
(a) The average time that a demand waits to be ?lled. [Including demands that are ?lled instantaneously.]
(b) The average time that a part spends in on-hand inventory. [Including parts that spend time 0 in on-hand inventory.]