PROBLEM $3$

Using CPM$/$PERT$,$ find the minimum number of days to finish the project. For each activily, find out the earliest start and finish time and the latest start and finish time. $($Use one week equal to $5$ days$)$

$\backslash$table$[[$Activity$,$Predecessor,Duration$],[$A$,-,4$ days$],[$B$,$A$,6$ days$],[$C$,$A$,4$ days$],[$B$,$C$,1$ Week$],[$E$,$B$,$C$,6$ days$],[$F$,$E$,2$ Weeks$]]$