A company must perform a maintenance project consisting of seven activities. The activities, their predecessors, and their respective time estimates are presented below:

$\backslash$table$[[$Activity$,$Immediate,$],[$Break down both machines,Designation,Predecessor,Time in Days,$],[$Clean machine $1,$A$,$None,$3,],[$Clean machine $2,$B$,$A$,2,],[$Re$-$set machine $1,$C$,$A$,4,],[$Re$-$set machine $2,$D$,$B$,3,],[$Re$-$calibrate both machines,E$,$C$,2,],[$Final test,F$,$D and E$,2,],[,$G$,$F$,4,]]$

Using the Single Time Estimate CPM procedure, what is the critical path?

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