Question $42(2\mathrm{.}041$ points$)$

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Which of the following are benefits of PERT$/$CPM$?$

a$)$ Graphically display the precedence relationships and sequence of activities.

b$)$ Identify critical activities that cannot be delayed without delaying the project.

c$)$ Estimate the project's duration.

d$)$ Estimate the amount of slack associated with non$-$critical activities.

e$)$ All of the above.