Question: LS and LF are wrong but I don't know why. Could you please explain? Reference Activity Duration (weeks) Predecessors Weeks activity can be crashed

LS and LF are wrong but I don't know why. Could you please explain?

 

ReferenceActivityDuration (weeks)PredecessorsWeeks activity
can be crashed		Weekly cost
of crash		ESEFLSLFSlack 

 
    
AHire workers8None3€2,00008-44       
BInstall equipment6None1€4,00006-24       
COrder materials3None1€1,00003710       
DTest equipment4B2€2,500610610       
ETrain workers6A,B2€5,000814410       
FPilot Testing5C,D3€3,00010151015   

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