Consider the information below for a project and answer the questions $($SHOW YOUR WORKINGS$).$

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$\backslash$table$[[$Activity$,$Normal,Crashed,Predecessor$],[$Time$,$Cost,Time,Cost$],[$A$,4$ days,$$1,000,3$ days,$$2,000,-],[$B$,3$ days,$5,000,3$ days,$5,000,-],[$C$,3$ days,$750,2$ days,$1,200,$B$],[$D$,7$ days,$3,500,5$ days,$5,000,$A$],[$E$,2$ days,$500,1$ day,$2,000,$A$,$ C$],[$F$,5$ days,$2,000,4$ days,$3,000,$B$],[$G$,9$ days,$4,500,7$ days,$6,300,D,E,F$