Question 2 (30 marks) There are 2 new products in the market, Product A and Product B. The net profit of selling one product A is RM 5 while product B is RM 4. Each product requires a certain amount of packing material and a certain amount of packing time. Each unit of product A and B needs 10 kg and 6 kg respectively of packing material. It takes an hour to pack 1 unit of product A and the same for product B. The total amount resources available each day for packing material and packing time are 45 kg and 300 minutes. a) Formulate the problem above as an integer linear programming model. (5 marks) b) Solve by using the branch and bound method to obtain the optimal solution. (25 marks)