For the given problem,

$\backslash$table$[[$Task$,$Predecessor,$\backslash$table$[[$Normal$],[$Time$],[($days$)]],\backslash$table$[[$Crash$],[$Time$],[($days$)]],\backslash$table$[[$Normal$],[$Cost$]],\backslash$table$[[$Crash$],[$Cost$]]],[$A$,3,2,40,120,],[$B$,7,5,30,80,],[$C$,$A$,$ B$,5,4,45,90],[$D$,$A$,6,5,30,50],[$E$,$C$,4,2,40,100],[$F$,$D$,$ E$,5,4,55,75]]$

Answer the following questions:

a$.$ What is the normal cost of the project?

b$.$ What is the length of the project?

c$.$ Which activity would you crash first to reduce the project by one day and what will be the cost to crash?

d$.$ Which activity would you crash next by an additional day and what would be the total $2$ day cost of crashing?