Using the following data develop a precedence network diagram. Then calculate the corresponding CPM values and clearly mark the critical path.

Note that activities $C$ and $D$ are contiguous, whereas the rest are all interruptible.

$\backslash$table$[[$Activity$,$IPA,Relationship,Duration$],[$A$,-,,],[$B$,$A$,$SS$-2,],[,,$FF$-1,],[$C$,$B$,$SS$-1,],[,,$FF$-4,],[$D$,$C$,$SS$-3,],[,,$FF$-2,],[$E$,$D$,$SS$-2,],[,,$FF$-1,],[$F$,$E$,$SS$-1,],[,,$FF$-2,]]$ Durations are A$-5$ B$-8$ C$-11$ D$3$ E$8$ F$2$