Problem 2.(20 marks in total) The following table provides basic information about a construction project Activity Activity Description Immediate Estimated Duration Predecessors A Excavate 2 weeks B Lay the foundation A 4 weeks C Put up the rough wall B 10 weeks D Put up the roof c 6 weeks E Install the exterior 4 weeks plumbing F Install the interior E $ weeks plumbing G Put up the exterior D 7 weeks siding H Do the exterior EG 9 weeks painting 1 Do the electrical work C 7 weeks J Put up the wall board FI 8 weeks X Install the flooring 4 weeks L Do the interior 3 weeks painting G la - M Install the exterior H 2 works fixtures N Install the interior KL 6 weeks fixtures (a) smark) Drw the project network (b) (1 mark) Under normal circumstances, can the project be completed within 40 week? Why? (0) (2 marks) What are the critical activities? (d) (2 mars) What is the critical path of the project? Consider the additional information below: Time Co Activity Normal Crash Normal Crash 2 weeks 1 week SI NO DOO $ 200 4 weeks 2 weeks 120.000 420.000 10 w 7 weeks 620.000 NA DOO D 6 weeks 4 weeks 200.000 100 E 4 weeks 41000 570.000 F Swo 110.000 260.000 G Two 4ks 900.000 120 H 9 weeks 200.000 30, DOO 1 7 Swak 210.00 270.00 1 6 40000 490 DOO 16000 200.000 Socks 3 250.000 350 DOO M cock 100.000 200 po 6 weeks SIDO Formula dari for each of the