please answer 2,3,4 based on the first question

1. Al's Athletics has just started the data collection required for you to help them develop their associated network design model. During the first conference call, they indicate that they have three reports they feel could be used to determine the model's demand per customer. Based on what you have learned in this chapter, which of the following reports could best help us create the demand file? For each of these reports, describe why or why not you could use it to cre- ate the demand file. a. Financial Report listing invoice payments received from all customer accounts over the course of the past year. b. Warehouse Management System Reports showing inventory levels during each month of the first quarter of last year. c. Transportation Shipment Report showing origins/destinations, shipment 2. Al's data provided us with demand in terms of pounds. Why does this make a good unit of measure for our model? What other units of measure may have been acceptable and why? 3. In the mathematical formulation, what does the X decision variable mean? Why does it have to take on a value of 0 or 1? 4. In the mathematical formulation, why can Y be a continuous linear variable and still give a legitimate solution? (For example, what does a Y value of 0.45 mean?)