Assume this project is time$-$constrained $($it has a non$-$negotiable due date$).$ As project manager, what should you do if it looks as though Activity #$5$ is going to finish two days late?

Apply the resource smoothing technique.

Notify the project sponsor that the project will be late.

Do nothing for now because Activity $5$ is NOT on the critical path, but continue to monitor the situation to make sure Activity $5$ does not get delayed any further.

Add resources $($such as hire additional workers or pay current employees overtime$)$ to expedite this activity.