Problem S11.9 Question Help Consider a three-firm supply chain consisting of a retailer, manufacturer, and supplier. The retailer's demand over an 8-week period was 90 units each of the first 2 weeks, 210 units each of the second 2 weeks, 290 units each of the third 2 weeks, and 420 units each of the fourth 2 weeks. The following table presents the orders placed by each firm in the supply chain. Notice, as is often the case in supply chains due to economies of scale, that total units are the same in each case, but firms further up the supply chain (away from the retailer) place larger, less frequent, orders. Click the icon to view the orders placed by each firm in the supply chain. Click the icon to view the ways of calculating the variance. - * More Info X Week 1 Manufacturer 180 Supplier 600 420 00 OWN- Retailer 90 90 210 210 290 290 420 420 580 1,420 7 840 Print Done Enter your answer in the answer box and then click Check Answer. a. What is the bullwhip measure for the retailer? b. What is the bullwhip measure for the manufacturer? c. What is the bullwhip measure for the supplier? d. What conclusions can you draw regarding the impact that economies of scale may have on the bullwhip effect