1. Suppose that the demand during lead time follows a normal distribution N(20,20) and the order quantity is 100. In order to maintain a service level (Type II)= 90%, calculate the standardized loss function.
2. If daily demand distribution D is N(50,20) and lead time L = 16. What is the distribution of the lead time demand LD.
3. The Parol Evidence Rule prevents any statements or promises made prior to the written contract from being considered or used at a later date. Is this Rule practical in it's application and enforrcement? Expalin.