Assume that Daraleigh just got an offer to further her study in University of Malaya (UM). She moves into Asrama Tunku Abdul Rahman (ASTAR) with some acquaintances. All her housemates, however, are slackers and do not clean up after themselves. She, on the other hand, can clean faster than each of them. She determines that she is 80% faster in dishes wash and 20% faster in vacuuming. All of these tasks have to be done daily. Which jobs should she assigns to her housemates to get the most free time overall? Assume that she has the 4 hours in devoting for cleaning. Explain. [Hints: imagine a trade-related analogy to this problem.]