Question 3 Aeropa Co. has a contract to develop a guided missile system. The activities, their durations and the precedence are shown in the table below. Activity Description B D E F G H 1 J L M N Design guidance system Design airframe Prepare re-entry unit spec. Test re-entry spec Develop and test airframe Design separation device Prepare quidance system spec. Manufacture re-entry vehicle Manufacture airframe Refine design of separation device Manufacture and test separation device Test re-entry vehicle Mating Test Test missile on dock Duration Must be completed (weeks) before this starts 37 15 21 24 9 B 21 C 6 22 D,F,G 28 EF 40 E, F 32 J 2 H 24 IL 6 KM a) Draw the network diagram for the project computing ES, LS, EF, LF and slack for each activity (15 marks) b) Use Production Flow Analysis to allocate the machines given in the following table to cells. (5 marks) 1 3 4 6 7 8 2 xlu 5 X X X X X M/C A B D E F G X X X X 1 X X XI