Given the following activity network: Activity A1 takes 5 weeks, A2 takes 7 weeks, and A3 takes 2 weeks. What is the latest start time of A3? weeks (round to the nearest integer) Given the following activity network: Activity A1 takes 3 weeks, A2 takes 8 weeks, A3 takes 10 weeks, A4 takes 9 weeks, A5 takes 4 weeks. What is the slack time of A3? weeks (round to the nearest integer) Given the following activity network: Activity A1 takes 3 weeks, A2 takes 8 weeks, A3 takes 7 weeks, A4 takes 9 weeks, A5 takes 4 weeks, A6 takes 3 weeks, A7 takes 4 weeks, What is the critical path of the project? A1,A2,A3,A4,A5,A6,A7 A1, A2, A3, A5, A7 A1,A2,A3,A6,A7 A1,A2,A4,A6,A7