Activity $7$ is directly preceded by two activities$$activity $5$ and activity $6.$ Activity $5$ has an expected duration of five and an ES time of six. Activity $6$ has an expected duration of seven and an ES time of seven. Activity $7$ has an expected duration of $10.$ The ES for activity $7$ is:

Question $21$Select one:

a$.$

$11$

b$.$

$14$

c$.$

$21$

d$.$

$24$

e$.$

$25$

Question $22$

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Question text

In precedence network analysis, knowing the slack time allows managers to:

I$)$ allocate scarce resources

II$)$ pay attention to activities that could delay the project

III$)$ delay critical activities

Question $22$Select one:

a$.$

I only

b$.$

II only

c$.$

III only

d$.$

I and II only

e$.$

I, II$,$ and III