Problem 1 Consider the following project to build a house. Draw the network for the project using the AOA method. What is the earliest time you can start to "build house"? When do you have to receive the materials you ordered in order not to delay the project? (7 + 3 + 3 = 13 marks) Task Description Time (weeks) Immediate predecessors D Design house, obtain financing |3 L Lay foundation 2 D O Order and receive materials D P Select paint L.O B Build house 3 L.O C Select carpet P F Finish work B,C Problem 2 The time to complete the following project is 16 weeks. What is the maximum time that the project can be crashed? How much would cost increase by? (12 marks) Activity A B C D G Precedence A B C D.E Normal Time 4 2 3 8 6 3 4 Normal Cost 2000 2200 500 2300 900 3000 1400 Crash Time 3 3 4 3 2 2 Crash Cost 2600 2800 500 2600 1200 4200 2000