A construction project is broken down into the following 10 activities: ACTIVITY IMMEDIATE PREDECESSOR TIME (WEEKS)
1 — 4
2 1 2
3 1 4
4 1 3
5 2, 3 5
6 3 6
7 4 2
8 5 3
9 6, 7 5
10 8, 9 7
b-1. Find the critical path.
1-3-5-8-10
1-2-5-8-10
1-3-6-9-10
1-4-7-9-10
b-2. How many weeks will the project take to complete?
c. If activities 1 and 10 cannot be shortened, but activities 2 through 9 can be shortened to a minimum of one week each at a cost of $10,000 per week, which of the following options would reduce the project duration by four weeks? (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer.)
Cut activity 3 by 3 weeks, and then reduce activity 6 or 9 by one week. unanswered
Cut activity 5 by 4 weeks. unanswered
Reduce activities 6 and 9 by a total of 3 weeks, and then reduce activity 3 by one week. unanswered
Cut activity 4 by 3 weeks, and then reduce activity 6 or 5 by one week. unanswered
Cut activity 5 by 3 weeks, and then reduce activity 4 or 9 by one week.