IUS Problem 2.626 marbre Botels The following table provides basic information about a construction project Activity Activity Description Immediate Estimated Durati Predecessors Excavate 2 weeks B Lay the foundati weeks C Put up the rough wall B 10 weeks D Pup the roof C 6 weeks E Install the extra 4 wecks plumbing F Install the intende E 5 weeks plumbing G Pull up the externe D 7 weeks siding H De the exterior EG 9 weeks painting 1 De the electrical work C 7 weeks Pip the wallhard F.I 8 weeks K 4 weeks L Do the inter 1 Swecks 1 M Install the extender H 2 weeks N Install the interior XL 6 weeks a) marks) Draw the project network (b) (uk) Under normal circumstances, the project be completed within 40 weeks Why? (c) mark) What are the entical activities ( dmarks) What is the critical path of the project Consider the additional information below Time Cost Activity Normal Crash Normal Crash A 2 weeks I wok SI 80.000 $ 280,000 B 4 weeks 520000 420,000 10 weeks ws 6.30 160,000 D 6 works ws 260.000 340,000 E 4 weeks 3 410.000 $70,000 F Swecks 1 INDO 250.000 G 7 weeks 900.000 1.020,000 H 9 weeks w 200.000 NO 1 7 weeks 5 was 210.000 270.000 3 weeks 6 400,000 490,000 4 weeks wo TO 200,000 L Swedis 250.000 350,000 M Iw 100.000 200,000 N 6 weds 370,000 510,000 le to marks) Formulare an LP modele de optimal crashing for cach of the activities in order to complete the project wide