Problem $4$:

Given the following information, answer the questions about this project:

a$.$ Draw the network as a Gantt chart.

b$.$ What is the critical path? Which activities have slack time?

c$.$ What would happen if activities B and D each took $5$ extra days to complete instead of the expected duration? How would the critical path change?

$\backslash$table$[[$Activity$,$Expected Duration,Predecessors$],[$A$,4$ days,$-],[$B$,9$ days,A$],[$C$,11$ days,A$],[$D$,5$ days,B$],[$E$,3$ days,B$],[$F$,7$ days,C$],[$G$,3$ days,D$.$ F$],[$H$,2$ days,E$.$ G$],[$I$,1$ day,H$]]$