Based on the given activity network, the latest completion time of A3to is 15 weeks.
Please refer to the graph attached below for the activity network diagram.
From the case, we know that activity A3 could only be started after the completion of activity A1 and A2. The activity A2 can only be started after activity A1 is finished. Hence, to find the latest completion time, we need to find the time spend on both activity A1 and A2.
Activity A1 takes 5 weeks. Assuming that the beginning week is week 0, activity A1 will be finished on week 5.
Activity A2 can start directly at week 5. Meanwhile activity A3 should wait for activity A2 to finish before getting start. Activity A2 takes 8 weeks and will be finished on week 13. Activity A3 then can start directly.
Activity A3 takes 2 week to finish. After starting on week 13, activity A3 will be finished on week 15.
Learn more about Activity Network here: https://brainly.com/question/14728281
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