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 Put up the rough wall B 10 weeks D Put up the roof 6 weeks E Install the exterior 4 weeks plumbing F Install the interior E 5 weeks plumbing G Put up the exterior D 7 weeks siding H Do the exterior painting E, G 9 weeks I Do the electrical work 7 weeks J Put up the wallboard FI 8 weeks K Install the flooring J 4 weeks L Do the interior painting J 5 weeks M Install the exterior H 2 weeks fixtures N Install the interior KL 6 weeks fixtures D Consider the additional information below: Time Cost Activity Normal Crash Normal Crash 2 weeks 1 week $180,000 $ 280,000 Time Cost Activity Normal Crash Normal Crash B D E F H I 4 weeks 10 weeks 6 weeks 4 weeks 5 weeks 7 weeks 9 weeks 7 weeks 8 weeks 4 weeks 5 weeks 2 weeks 6 weeks 2 weeks 7 weeks 4 weeks 3 weeks 3 weeks 4 weeks 6 weeks 5 weeks 6 weeks 3 weeks 3 weeks I week 3 weeks 320,000 620,000 260.000 410,000 180,000 900,000 200,000 210,000 430,000 160,000 250,000 100,000 330,000 420.000 860.000 340,000 570,000 260,000 1,020,000 380,000 270,000 490,000 200,000 350,000 200,000 $10,000 K L M N (t) Use Lingo to solve the crashing problem. Report the optimal solution found, as well as the optimal crashing cost