an online retailer uses a fixed time period with safety stock inventory to control the inventory of a type of virtual reality (VR) headsets it stocks. Demands for the VR headsets averages 50 units per day and the standard deiation of the daily demand is 9 units.Knowing that the firm operates 7 days a week, assign the jobs according to each of the following priority rules: a. earliest due date (EDD) b. slack time remaining (STR) c. which one of the priority rules do you determine to be the best in this particular case? explain. if a priority rule results in a tie, between two or more jobs, break the tie by scheduling the tied job in alphabetical order