AJ company sells microcomputer to four universities and ships them from three distribution warehouses. As in Table 2 below, the distributor is able to supply the following numbers of microcomputers to the universities by the beginning of the academic year. Table 2: Number of microcomputers in distribution Distribution Warehouse Number of microcomputers A 420 B 610 340 Four universities have ordered microcomputers that must be delivered and installed by the beginning of the academic year as in Table 3 below. Table 3: Demand on microcomputers University Demand UA 520 UZ 250 UI 400 MD 380 The shipping and installation costs (RM) per computer from each warehouse to each university are as in Table 4 below. Table 4: Installation cost (RM) University Warehouse UA UZ UI MD A 22 17 30 18 B 15 35 20 25 28 21 16 14 (a) Briefly explain on unbalanced transportation problem based on Table 2 and Table 3. (1 mark) (b) Deduce the initial solution using Vogel's Approximation Method. (7 marks) (c) Use MODI method to determine the minimum cost of the transportation problem. (17 marks)