If a delay in an activity will not delay completion of the whole project, the activity _________.

Group of answer choices

has a short expected completion time

has slack

is one of the first tasks to be completed

has a long expected completion time

is on the critical path

In making a backward pass through a network, activity L has an activity time of 6 and immediately precedes activities M, P, and T. The late start times for activities M, P, and T are 32, 27, and 26, respectively. The late finish times for activities M, P, and T are 39, 37, and 33, respectively. What is the late start time for activity L?

Group of answer choices

20

22

13

33

17