6. Describe the network design currently used at let Century. Put yourself in Liu Feng's position. What are the common network designs and the implication for supply chain costs? Regarding let Century's growth strategy, how could the current network design be operated to reduce total logistics cost? Consider the location of the publishers and the possibility of implementing new routes. 7. Map the current network design as a minimum cost problem and calculate total network costs through linear optimization. Which quantities do you order from the three publishers? 8. The 3PL of let Century offers Liu Feng the opportunity to expand the contract logistics cooperation. let Century can rent a part of the 3PL's warehouse in Beijing. Does it make sense for let Century to use a second warehouse? Map the new situation. 9. Liu Feng considers having some shops supply other shops. Thus, the transportation routes of the trucks could be linked to all other shops. Liu Feng thinks that the shops in Shanghai, Beijing, Tianjing, and Qingdao are the most appropriate because they have the most floor space. What would 21st Century's transportation network look like with these \"mega cities" and the second warehouse? Do you think Liu Feng's idea is feasible