Question 6 (1 point) Which one of the following statements is true? The last activity of a project (i.e., the node without any successors) must be a critical activity. The project duration can be shorter than the length of its critical path It is possible that all activities of a project are non-critical. The slack of an activity can be a negative number Question 7 (1 point) Delaying an activity on the critical path will increase the project duration. True False Question 8 (1 point) The critical path is the shortest path(s) in a CPM network. True False Question 9 (1 point) All activities on the critical path have their LS equal to the ES. True False Question 10 (1 point) If an activity has multiple immediate predecessors, its ES is the minimum of all EF values of its predecessors True False